Evaluate the following percent problem
40 is 80 percent (%) of what number?
Set up an equation
Let's call our missing number x.
Expressing this in terms of an equation, we get:
40 = 80% * x
Express this as a percentage
Percentage = percent number/100
| 40 = | 80x |
| 100 |
Multiply both sides by 100
| 40 * 100 = | 80 * 100x |
| 100 |
4000 = 80x
Divide each side by 80
| 4000 |
| 80 |
| = |
| 80x |
| 80 |
Cancel both 80
| 4000 |
| 80 |
| = |
| x = | 4000 |
| 80 |
Final Answer
40 is 80 percent (%) of 50
Common Core State Standards In This Lesson
4.NF.C.6, 6.RP.A.3.C
What is the Answer?
40 is 80 percent (%) of 50
How does the Percentage-Decimal-Fraction Relations Calculator work?
Free Percentage-Decimal-Fraction Relations Calculator - Calculates the relational items between a fraction, a decimal (including repeating decimal and terminating decimal), a percentage, and the numerator and denominator piece of that fraction. Also calculates the percentage change going from one number to another or the amount increase or decrease of a percentage above/below a number. Round decimals. decimals into fractions
This calculator has 1 input.
This calculator has 1 input.
What 3 formulas are used for the Percentage-Decimal-Fraction Relations Calculator?
Percent = Decimal * 100%
Decimal = Percent/100
Decimal = Numerator/Denominator
Decimal = Percent/100
Decimal = Numerator/Denominator
What 6 concepts are covered in the Percentage-Decimal-Fraction Relations Calculator?
- decimal
- Number in the form a/b where the result is not a whole number
- denominator
- The bottom portion of a fraction. For a/b, b is the denominator
- fraction
- how many parts of a certain size exist
a/b where a is the numerator and b is the denominator - numerator
- the number above the line in a common fraction
- percent
- a specified amount in or for every hundred. one part in every hundred.
n% = n/100 - percentage-decimal-fraction relations
