-31.03% is the change from 899 to 620
Calculation steps:
[( 620 - 899 ) ÷ 899] x 100 = -31.03%
Formula
Percentage change = [(620 - 899) / 899] x 100
Subtract the new number by the original number
620 - 899 = -279
-279 ÷ 899 = -0.3103448275862069
-0.3103448275862069 x 100 = -31.03%