69.77% is the change from 387 to 657
Calculation steps:
[( 657 - 387 ) ÷ 387] x 100 = 69.77%
Formula
Percentage change = [(657 - 387) / 387] x 100
Subtract the new number by the original number
657 - 387 = 270
270 ÷ 387 = 0.6976744186046512
0.6976744186046512 x 100 = 69.77%