-88.93% is the change from 921 to 102
Calculation steps:
[( 102 - 921 ) ÷ 921] x 100 = -88.93%
Formula
Percentage change = [(102 - 921) / 921] x 100
Subtract the new number by the original number
102 - 921 = -819
-819 ÷ 921 = -0.8892508143322475
-0.8892508143322475 x 100 = -88.93%