70.36% is the change from 307 to 523
Calculation steps:
[( 523 - 307 ) ÷ 307] x 100 = 70.36%
Formula
Percentage change = [(523 - 307) / 307] x 100
Subtract the new number by the original number
523 - 307 = 216
216 ÷ 307 = 0.7035830618892508
0.7035830618892508 x 100 = 70.36%