# X% of Y Calculator

getcalc.com's **X percent of Y Calculator** is an online basic math functions tool to find what is X% of Y to measure the relative percent value in each hundred of the reference value. To calculate X is what percentage of Y, percentage difference, change, increase, decrease or error, use the below calculators

## Definition and Formula: X Percent of Y

**X% of Y** is an important mathematical function also used to measure the relative score or quantity in each hundred. For example, the question *what is 97 percent of 1200* can be written as what is 97% of 12000?