-76.21% is the change from 870 to 207
Calculation steps:
[( 207 - 870 ) ÷ 870] x 100 = -76.21%
Formula
Percentage change = [(207 - 870) / 870] x 100
Subtract the new number by the original number
207 - 870 = -663
-663 ÷ 870 = -0.7620689655172413
-0.7620689655172413 x 100 = -76.21%