Ratios Calculator

Two or more terms separated by ":", "to", "/" or commas. Decimals are allowed.
Leave that term blank; the other three are required.
Ratio in lowest terms
3 : 4
Ratio and Proportion Calculator
Greatest common divisor used
4
First term / second term
0.75
Each term as a percentage of the total
42.8571% : 57.1429%
Summary
12 : 16 simplifies to 3 : 4.
Worked out from OpenStax, Prealgebra 2e §5.6 "Ratios and Rate" and §6.5 "Solve Proportions" (cross products a·d = b·c) and 1 other source.

How this is worked out

3 steps
  1. Terms: 12 : 16
  2. Greatest common divisor of the terms: 4
  3. Divide every term by it: 3 : 4

Results are general information, not financial, tax, legal, medical or engineering advice.