-35.32% is the change from 971 to 628
Calculation steps:
[( 628 - 971 ) ÷ 971] x 100 = -35.32%
Formula
Percentage change = [(628 - 971) / 971] x 100
Subtract the new number by the original number
628 - 971 = -343
-343 ÷ 971 = -0.3532440782698249
-0.3532440782698249 x 100 = -35.32%