-83.21% is the change from 971 to 163
Calculation steps:
[( 163 - 971 ) ÷ 971] x 100 = -83.21%
Formula
Percentage change = [(163 - 971) / 971] x 100
Subtract the new number by the original number
163 - 971 = -808
-808 ÷ 971 = -0.8321318228630278
-0.8321318228630278 x 100 = -83.21%