-10.66% is the change from 638 to 570
Calculation steps:
[( 570 - 638 ) ÷ 638] x 100 = -10.66%
Formula
Percentage change = [(570 - 638) / 638] x 100
Subtract the new number by the original number
570 - 638 = -68
-68 ÷ 638 = -0.10658307210031348
-0.10658307210031348 x 100 = -10.66%