-33.26% is the change from 971 to 648
Calculation steps:
[( 648 - 971 ) ÷ 971] x 100 = -33.26%
Formula
Percentage change = [(648 - 971) / 971] x 100
Subtract the new number by the original number
648 - 971 = -323
-323 ÷ 971 = -0.33264675592173015
-0.33264675592173015 x 100 = -33.26%