-87.3% is the change from 921 to 117
Calculation steps:
[( 117 - 921 ) ÷ 921] x 100 = -87.3%
Formula
Percentage change = [(117 - 921) / 921] x 100
Subtract the new number by the original number
117 - 921 = -804
-804 ÷ 921 = -0.8729641693811075
-0.8729641693811075 x 100 = -87.3%