-35.42% is the change from 960 to 620
Calculation steps:
[( 620 - 960 ) ÷ 960] x 100 = -35.42%
Formula
Percentage change = [(620 - 960) / 960] x 100
Subtract the new number by the original number
620 - 960 = -340
-340 ÷ 960 = -0.3541666666666667
-0.3541666666666667 x 100 = -35.42%