-85.12% is the change from 921 to 137
Calculation steps:
[( 137 - 921 ) ÷ 921] x 100 = -85.12%
Formula
Percentage change = [(137 - 921) / 921] x 100
Subtract the new number by the original number
137 - 921 = -784
-784 ÷ 921 = -0.8512486427795874
-0.8512486427795874 x 100 = -85.12%