70.68% is the change from 307 to 524
Calculation steps:
[( 524 - 307 ) ÷ 307] x 100 = 70.68%
Formula
Percentage change = [(524 - 307) / 307] x 100
Subtract the new number by the original number
524 - 307 = 217
217 ÷ 307 = 0.7068403908794788
0.7068403908794788 x 100 = 70.68%