70.78% is the change from 308 to 526
Calculation steps:
[( 526 - 308 ) ÷ 308] x 100 = 70.78%
Formula
Percentage change = [(526 - 308) / 308] x 100
Subtract the new number by the original number
526 - 308 = 218
218 ÷ 308 = 0.7077922077922078
0.7077922077922078 x 100 = 70.78%