What percentage modes are available?

CalcVo supports percent-of, reverse percent, difference, increase, decrease, and of-what calculations on one page. Switch modes online to solve the most common percentage problems without re-entering your numbers — useful for discounts, tips, grade weights, and year-over-year change comparisons worldwide.

How do I calculate a percentage of a number?

Use Percent of mode: enter the percent and the base value. The result equals (percent ÷ 100) × value. For example, 15% of 200 is 30. The calculator shows the formula step so you can verify the math before using the result in a spreadsheet or report.

How do I find what percent one number is of another?

Use Of What mode with the part and the whole. The result is (part ÷ whole) × 100. This answers questions like what percent 25 is of 200, which equals 12.5%. Percent change always divides by the original value, not the new one.