212% is the change from 100 to 312
Calculation steps:
[( 312 - 100 ) ÷ 100] x 100 = 212%
Formula
Percentage change = [(312 - 100) / 100] x 100
Subtract the new number by the original number
312 - 100 = 212
212 ÷ 100 = 2.12
2.12 x 100 = 212%
Example