-31.75% is the change from 970 to 662
Calculation steps:
[( 662 - 970 ) ÷ 970] x 100 = -31.75%
Formula
Percentage change = [(662 - 970) / 970] x 100
Subtract the new number by the original number
662 - 970 = -308
-308 ÷ 970 = -0.31752577319587627
-0.31752577319587627 x 100 = -31.75%