69.68% is the change from 310 to 526
Calculation steps:
[( 526 - 310 ) ÷ 310] x 100 = 69.68%
Formula
Percentage change = [(526 - 310) / 310] x 100
Subtract the new number by the original number
526 - 310 = 216
216 ÷ 310 = 0.6967741935483871
0.6967741935483871 x 100 = 69.68%