59.84% is the change from 620 to 991
Calculation steps:
[( 991 - 620 ) ÷ 620] x 100 = 59.84%
Formula
Percentage change = [(991 - 620) / 620] x 100
Subtract the new number by the original number
991 - 620 = 371
371 ÷ 620 = 0.5983870967741935
0.5983870967741935 x 100 = 59.84%