-24.48% is the change from 870 to 657
Calculation steps:
[( 657 - 870 ) ÷ 870] x 100 = -24.48%
Formula
Percentage change = [(657 - 870) / 870] x 100
Subtract the new number by the original number
657 - 870 = -213
-213 ÷ 870 = -0.24482758620689654
-0.24482758620689654 x 100 = -24.48%