59.58% is the change from 621 to 991
Calculation steps:
[( 991 - 621 ) ÷ 621] x 100 = 59.58%
Formula
Percentage change = [(991 - 621) / 621] x 100
Subtract the new number by the original number
991 - 621 = 370
370 ÷ 621 = 0.5958132045088567
0.5958132045088567 x 100 = 59.58%