50% is the change from 662 to 993
Calculation steps:
[( 993 - 662 ) ÷ 662] x 100 = 50%
Formula
Percentage change = [(993 - 662) / 662] x 100
Subtract the new number by the original number
993 - 662 = 331
331 ÷ 662 = 0.5
0.5 x 100 = 50%
Example