64.34% is the change from 603 to 991
Calculation steps:
[( 991 - 603 ) ÷ 603] x 100 = 64.34%
Formula
Percentage change = [(991 - 603) / 603] x 100
Subtract the new number by the original number
991 - 603 = 388
388 ÷ 603 = 0.6434494195688225
0.6434494195688225 x 100 = 64.34%