-67.01% is the change from 970 to 320
Calculation steps:
[( 320 - 970 ) ÷ 970] x 100 = -67.01%
Formula
Percentage change = [(320 - 970) / 970] x 100
Subtract the new number by the original number
320 - 970 = -650
-650 ÷ 970 = -0.6701030927835051
-0.6701030927835051 x 100 = -67.01%