-15.77% is the change from 970 to 817
Calculation steps:
[( 817 - 970 ) ÷ 970] x 100 = -15.77%
Formula
Percentage change = [(817 - 970) / 970] x 100
Subtract the new number by the original number
817 - 970 = -153
-153 ÷ 970 = -0.1577319587628866
-0.1577319587628866 x 100 = -15.77%