-31.82% is the change from 971 to 662
Calculation steps:
[( 662 - 971 ) ÷ 971] x 100 = -31.82%
Formula
Percentage change = [(662 - 971) / 971] x 100
Subtract the new number by the original number
662 - 971 = -309
-309 ÷ 971 = -0.31822863027806386
-0.31822863027806386 x 100 = -31.82%