2:2?

1:1

Reason: simplify the ratio by dividing both terms by their greatest common divisor (gcd). gcd(2,2) = 2, so 2:2 ÷ 2 = 1:1. Equivalently, 2/2 = 1. If you have a:a in any ratio, it simplifies to 1:1. Want a couple of quick practice problems?