-31.19% is the change from 901 to 620
Calculation steps:
[( 620 - 901 ) ÷ 901] x 100 = -31.19%
Formula
Percentage change = [(620 - 901) / 901] x 100
Subtract the new number by the original number
620 - 901 = -281
-281 ÷ 901 = -0.3118756936736959
-0.3118756936736959 x 100 = -31.19%