49.77% is the change from 663 to 993
Calculation steps:
[( 993 - 663 ) ÷ 663] x 100 = 49.77%
Formula
Percentage change = [(993 - 663) / 663] x 100
Subtract the new number by the original number
993 - 663 = 330
330 ÷ 663 = 0.497737556561086
0.497737556561086 x 100 = 49.77%