-34.25% is the change from 981 to 645
Calculation steps:
[( 645 - 981 ) ÷ 981] x 100 = -34.25%
Formula
Percentage change = [(645 - 981) / 981] x 100
Subtract the new number by the original number
645 - 981 = -336
-336 ÷ 981 = -0.3425076452599388
-0.3425076452599388 x 100 = -34.25%