-83.93% is the change from 921 to 148
Calculation steps:
[( 148 - 921 ) ÷ 921] x 100 = -83.93%
Formula
Percentage change = [(148 - 921) / 921] x 100
Subtract the new number by the original number
148 - 921 = -773
-773 ÷ 921 = -0.8393051031487514
-0.8393051031487514 x 100 = -83.93%