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Calculate the percentage of a number solving the equation P% * X = Y for Y or find the percentage of one number to another solving the equation Y/X = P% for P or find a whole number from a percentage part solving Y/P% = X for X.
Change in percentage as an increase or decrease can be calculated using Percentage Change Calculator while percentage conversions can be solved with Decimal to Percent, Percent to Decimal, Fraction to Percent, or Percent to Fraction.
Calculator 1a is a word problem version of the equation P% * X = Y in 1b so they are solved the same way. For example, how to solve for the percentage of a number:
Combining the calculations you can get the formula for P% * X = (P/100) * X = Y so 10% * 150 = (10/100) * 150 = 15
Calculator 2a is a word problem version of the equation Y/X = P% in 2b so they are solved the same way. This calculation is converting a ratio or fraction to a percentage. For example, how to solve for the percentage of one number to another:
Combining the calculations you can get the formula for Y/X = ((Y/X) * 100)% = P% so 15/150 = ((15/150) * 100)% = 10%
Calculator 3a is a word problem version of the equation Y/P% = X in 3b so they are solved the same way. For example, how to solve for a value when you know what a percentage part is:
Combining the calculations you can get the formula for Y/P% = Y/(P/100) = X so 15/10% = 15/(10/100) = 150
Weisstein, Eric W. "Percent." From MathWorldA Wolfram Web Resource. http://mathworld.wolfram.com/Percent.html
Cite this content, page or calculator as:
Furey, Edward "Percentage Calculator" From http://www.CalculatorSoup.com  Online Calculator Resource.