-34.66% is the change from 981 to 641
Calculation steps:
[( 641 - 981 ) ÷ 981] x 100 = -34.66%
Formula
Percentage change = [(641 - 981) / 981] x 100
Subtract the new number by the original number
641 - 981 = -340
-340 ÷ 981 = -0.34658511722731905
-0.34658511722731905 x 100 = -34.66%