-34.05% is the change from 972 to 641
Calculation steps:
[( 641 - 972 ) ÷ 972] x 100 = -34.05%
Formula
Percentage change = [(641 - 972) / 972] x 100
Subtract the new number by the original number
641 - 972 = -331
-331 ÷ 972 = -0.3405349794238683
-0.3405349794238683 x 100 = -34.05%