-27.36% is the change from 870 to 632
Calculation steps:
[( 632 - 870 ) ÷ 870] x 100 = -27.36%
Formula
Percentage change = [(632 - 870) / 870] x 100
Subtract the new number by the original number
632 - 870 = -238
-238 ÷ 870 = -0.2735632183908046
-0.2735632183908046 x 100 = -27.36%