-29.07% is the change from 970 to 688
Calculation steps:
[( 688 - 970 ) ÷ 970] x 100 = -29.07%
Formula
Percentage change = [(688 - 970) / 970] x 100
Subtract the new number by the original number
688 - 970 = -282
-282 ÷ 970 = -0.2907216494845361
-0.2907216494845361 x 100 = -29.07%