2:2=

It depends on the interpretation:

• As a ratio: 2:2 simplifies to 1:1 (divide both terms by 2).
• As a division: 2 ÷ 2 = 1.

So the simplified ratio is 1:1, and the division gives 1. If you’re asking for a single number, the result is 1. If you’re describing a proportion, it’s 1:1.