Question

Select all ratios equivalent to 11:10.

Answer 1

Any ratio a:b is equivalent to 11:10 exactly when a/b = 11/10, i.e. when 10a = 11b. Equivalently the general form is

11k : 10k for any nonzero k.

Examples: 22:20, 33:30, 44:40, 55:50, 110:100, 121:110, 1.1:1, 0.11:0.1. (Also -11:-10, -22:-20, etc., if you allow negative scaling.)

If you have a list of choices, paste them and I’ll mark which ones are equivalent.