## Calculator Use

Find a percent or work out the percentage provided numbers and also percent values. Usage percent formulas to figure out percentages and also unknowns in equations. Add or subtract a portion from a number or deal with the equations.

You are watching: 15 is 10 percent of what number

## How to calculation Percentages

There are many formulas for percent problems. You can think of the most an easy as X/Y = ns x 100. The formulas listed below are all mathematical sports of this formula.

Let"s check out the three an easy percentage problems. X and also Y room numbers and P is the percentage:

uncover P percent that X discover what percent that X is Y discover X if p percent of that is YRead on come learn an ext about just how to number percentages.

See more: Write A Fraction Greater Than 1, Which Fraction Is Greater Than 1

## 1. Just how to calculate portion of a number. Usage the percentage formula: P% * X = Y

Example: What is 10% that 150?

transform the trouble to an equation utilizing the percentage formula: P% * X = Y p is 10%, X is 150, for this reason the equation is 10% * 150 = Y convert 10% to a decimal by removed the percent sign and dividing by 100: 10/100 = 0.10 instead of 0.10 for 10% in the equation: 10% * 150 = Y i do not care 0.10 * 150 = Y execute the math: 0.10 * 150 = 15 Y = 15 for this reason 10% of 150 is 15 dual check her answer through the original question: What is 10% the 150? main point 0.10 * 150 =**15**

## 2. Exactly how to find what percent that X is Y. Usage the percentage formula: Y/X = P%

Example: What percent the 60 is 12?

convert the problem to an equation making use of the percent formula: Y/X = P% X is 60, Y is 12, so the equation is 12/60 = P% carry out the math: 12/60 = 0.20 Important! The an outcome will always be in decimal form, not portion form. You should multiply the result by 100 to gain the percentage. Convert 0.20 to a percent: 0.20 * 100 = 20% therefore 20% the 60 is 12. Twin check your answer through the initial question: What percent of 60 is 12? 12/60 = 0.20, and also multiplying through 100 to gain percentage, 0.20 * 100 =**20%**

## 3. Exactly how to discover X if p percent of it is Y. Usage the percentage formula Y/P% = X

Example: 25 is 20% of what number?

convert the problem to one equation making use of the percentage formula: Y/P% = X Y is 25, P% is 20, so the equation is 25/20% = X convert the portion to a decimal by splitting by 100. Converting 20% come a decimal: 20/100 = 0.20 substitute 0.20 for 20% in the equation: 25/0.20 = X carry out the math: 25/0.20 = X X = 125 so 25 is 20% the 125 double check her answer v the original question: 25 is 20% the what number? 25/0.20 =**125**

### Remember: how to transform a portion to a decimal

eliminate the percent sign and also divide by 100 15.6% = 15.6/100 = 0.156### Remember: exactly how to convert a decimal to a percentage

multiply by 100 and add a portion sign 0.876 = 0.876 * 100 = 87.6%## Percentage Problems

There room nine sport on the three an easy problems including percentages. See if you can match your trouble to among the samples below. The trouble formats match the input fields in the calculator above. Formulas and examples are included.

### What is p percent that X?

created as one equation: Y = P% * X The "what" is Y the we want to solve for remember to first convert percent to decimal, separating by 100 Solution: fix for Y making use of the percent formula**Y = P% * X**

### Example: What is 10% of 25?

Written utilizing the percentage formula:**Y = 10% * 25**first convert percentage to a decimal 10/100 = 0.1 Y = 0.1 * 25 = 2.5 so 10% that 25 is 2.5