What Percentage Is X of Y Calculator

Put the part in This value and the total it belongs to in is what % of. The calculator divides the first by the second and multiplies by 100: part ÷ whole × 100. The defaults read "30 is what % of 200" and return 15.00%.

Order matters. Swap the boxes and the same two numbers say that 200 is 666.67% of 30. If a result looks far too big or too small, check you haven't entered them the wrong way round.

Decimals work in both boxes, and a negative part gives a negative result: a loss of 12 on a base of 80 shows as −15.00%.

Say you scored 9 out of 10 on one quiz (90%) and 30 out of 50 on a longer test (60%). The average of the two percentages is 75%, but that treats a 10-question quiz as equal to a 50-question test.

Add the parts and the wholes first: 39 correct out of 60 questions. Enter 39 and 60 and you get 65.00%, your real overall score. The same applies to conversion rates across campaigns, attendance across months, or any share built from groups of different sizes.

These questions sound alike but have different answers. 45 is 118.42% of 38, so it is 18.42% more than 38. Subtract 100 from this calculator's answer to get the difference. For a change between an old and a new value, the Percentage Increase / Decrease calculator gives it directly.

• A dash means the whole is zero. A share of nothing can't be calculated.
• Two decimal places are always shown. One third displays as 33.33% and two thirds as 66.67%.
• Rounded shares may not add to 100. Three equal thirds show as 33.33% each, which adds to 99.99%. In a report, either say that figures are rounded or adjust the largest share so the column adds up to exactly 100%.