-34.15% is the change from 981 to 646
Calculation steps:
[( 646 - 981 ) ÷ 981] x 100 = -34.15%
Formula
Percentage change = [(646 - 981) / 981] x 100
Subtract the new number by the original number
646 - 981 = -335
-335 ÷ 981 = -0.3414882772680938
-0.3414882772680938 x 100 = -34.15%