15.96% is the change from 570 to 661
Calculation steps:
[( 661 - 570 ) ÷ 570] x 100 = 15.96%
Formula
Percentage change = [(661 - 570) / 570] x 100
Subtract the new number by the original number
661 - 570 = 91
91 ÷ 570 = 0.15964912280701754
0.15964912280701754 x 100 = 15.96%