-36.05% is the change from 971 to 621
Calculation steps:
[( 621 - 971 ) ÷ 971] x 100 = -36.05%
Formula
Percentage change = [(621 - 971) / 971] x 100
Subtract the new number by the original number
621 - 971 = -350
-350 ÷ 971 = -0.3604531410916581
-0.3604531410916581 x 100 = -36.05%