-31.87% is the change from 910 to 620
Calculation steps:
[( 620 - 910 ) ÷ 910] x 100 = -31.87%
Formula
Percentage change = [(620 - 910) / 910] x 100
Subtract the new number by the original number
620 - 910 = -290
-290 ÷ 910 = -0.31868131868131866
-0.31868131868131866 x 100 = -31.87%