308% is the change from 150 to 612
Calculation steps:
[( 612 - 150 ) ÷ 150] x 100 = 308%
Formula
Percentage change = [(612 - 150) / 150] x 100
Subtract the new number by the original number
612 - 150 = 462
462 ÷ 150 = 3.08
3.08 x 100 = 308%
Example