-83.4% is the change from 940 to 156
Calculation steps:
[( 156 - 940 ) ÷ 940] x 100 = -83.4%
Formula
Percentage change = [(156 - 940) / 940] x 100
Subtract the new number by the original number
156 - 940 = -784
-784 ÷ 940 = -0.8340425531914893
-0.8340425531914893 x 100 = -83.4%