-33.09% is the change from 970 to 649
Calculation steps:
[( 649 - 970 ) ÷ 970] x 100 = -33.09%
Formula
Percentage change = [(649 - 970) / 970] x 100
Subtract the new number by the original number
649 - 970 = -321
-321 ÷ 970 = -0.3309278350515464
-0.3309278350515464 x 100 = -33.09%