152.89% is the change from 121 to 306
Calculation steps:
[( 306 - 121 ) ÷ 121] x 100 = 152.89%
Formula
Percentage change = [(306 - 121) / 121] x 100
Subtract the new number by the original number
306 - 121 = 185
185 ÷ 121 = 1.5289256198347108
1.5289256198347108 x 100 = 152.89%