percentage

You have a meal at a restaurant and decide to leave the server a 10 percent tip. The meal was $22.47. How much is the tip? The way to solve this is to realize 10% means move the decimal point one space left: 10% of 22.47 = 2.247 Rounded to 2 decimal points for currency, we have $2.25

There are 480 stalks of flowers in a shop. 30% of them are lilies. 45% of them are orchids and the rest are roses. How many roses are there 30% + 45% = 75% This means we have 100% - 75% = 25% roses. 25% = 25/100 = 1/4 480/4 = 120 roses

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x% of y is the same as y% of x Example 1: 18% of 10 is the same as 10% of 18 10% is easy because we move the decimal one place left to get 1.8 Example 2: 40% of 50 is the same as 50% of 40 50% is easy because we cut a number in half 40/2 = 20

What is 33 & 1/3% of 9? 33 & 1/3 = 1/3 1/3 of 9 = 3

90% of the day in September were sunny. How many day were sunny? September has 30 days, so we have: Sunny Days = 90% * 30 Sunny Days = 27

Yesterday, there were 72 problems assigned for math homework. Austen got 18 problems correct and 54 problems incorrect. What percentage did Austen get correct? 18/72 as a percentage is 25%

A $650 television costs $702 after sales tax is figured in. What is the sales tax percentage? Calculate Sales Tax Amount: Sales Tax Amount = Total Bill - Original Cost Sales Tax Amount = 702 - 650 Sales Tax Amount = 52 Calculate Sales Tax Percentage: Sales Tax Percentage = 100% * Sales Tax...

A zoo has 15 Emperor penguins. The Emperor penguins make up 30% percent of all the penguins at the zoo. How many penguins live at the zoo? Let p be the total number penguins at the zoo. We're told: 30% of p = 15 Since 30% = 0.3, we have: 0.3p = 15 Solve for p in the equation 0.3p = 15 Step...

if a city grows by 12% per month what is the yearly growth rate We know that there are 12 months in a year. 12% = 0.12 Annual Growth Rate = (1 + Monthly Growth Rate)^12 - 1 Annual Growth Rate = (1 + 0.12)^12 - 1 Annual Growth Rate = (1.12)^12 - 1 Annual Growth Rate = 3.89597599255 - 1 Annual...

A local Dunkin’ Donuts shop reported that its sales have increased exactly 16% per year for the last 2 years. This year’s sales were $80,642. What were Dunkin' Donuts' sales 2 years ago? Declare variable and convert numbers: 16% = 0.16 let the sales 2 years ago be s. s(1 + 0.16)(1 + 0.16) =...

Jonathan earns a base salary of $1500 plus 10% of his sales each month. Raymond earns $1200 plus 15% of his sales each month. How much will Jonathan and Raymond have to sell in order to earn the same amount each month? Step 1: Set up Jonathan's sales equation S(m) where m is the amount of sales...

If 25% of 30% of x is 9, what is x? Convert percentages to decimals when multiplying: 25% = 0.25 30% = 0.3 0.25 * 0.3 * x = 9 0.075x = 9 Using our math engine, we type this equation in and we get: x = 120

If m% of m is 36, then m is? m% = m/100, so we have: m/100 * m = 36 m^2/100 = 36 Cross multiply and we get: m^2 = 3600 We use our radical expressions simplifier to get: m = 60

what did i make on a test if i had 65 questions and got 40 correct 40/65 = 61.54%

cheryl scores 68 out of 80 on her science test, nadia scores 86 out of 120 on her science test and ali scores 120 out of 150 on her science test. who preforms the best in his/her science test Cheryl: 68/80 = 85% Nadia: 86/120 = 71.67% Ali: 120/150 = 80% Cheryl has the highest percentage, so...

You conduct 50,000 tests, 1500 people test positive, what's the positivity rate? Our Positivity Rate formula is below: Positivity Rate = 100% * positive tests / Total tests Plugging in our numbers from the problem, we get: Positivity Rate = 100% * 1500/50000 Positivity Rate = 100% * 0.03...

tammy earns $18000 salary with 4% comission on sales. How much should she sell to earn $55,000 total We have a commission equation below: Sales * Commission percent = Salary We're given 4% commission percent and 55,000 salary. With 4% as 0.04, we have: Sales * 0.04 = 55,000 Divide each side...

During Michael Jordan's NBA career (1984–2003), he averaged a free throw completion percentage of 83.5% in regular season play. If Jordan threw 8,772 free throws in his career, how many completed free throws did he make? We want 83.5% of 8772 which is 7324.62. We round down for completed free...

45.62% of Ricks home is lit at night with fluorescent bulbs and the remaining with LED lights. what is the percentage is lit with LED lights? Since the remaining is lit with LED lights, fluorescent and LED make up 100% of the lighting. So we have: Percentage of LED lights = 100% - 45.62%...