63.8% is the change from 605 to 991
Calculation steps:
[( 991 - 605 ) ÷ 605] x 100 = 63.8%
Formula
Percentage change = [(991 - 605) / 605] x 100
Subtract the new number by the original number
991 - 605 = 386
386 ÷ 605 = 0.6380165289256199
0.6380165289256199 x 100 = 63.8%