628.57% is the change from 42 to 306
Calculation steps:
[( 306 - 42 ) ÷ 42] x 100 = 628.57%
Formula
Percentage change = [(306 - 42) / 42] x 100
Subtract the new number by the original number
306 - 42 = 264
264 ÷ 42 = 6.285714285714286
6.285714285714286 x 100 = 628.57%