-68.04% is the change from 970 to 310
Calculation steps:
[( 310 - 970 ) ÷ 970] x 100 = -68.04%
Formula
Percentage change = [(310 - 970) / 970] x 100
Subtract the new number by the original number
310 - 970 = -660
-660 ÷ 970 = -0.6804123711340206
-0.6804123711340206 x 100 = -68.04%