50% is the change from 442 to 663
Calculation steps:
[( 663 - 442 ) ÷ 442] x 100 = 50%
Formula
Percentage change = [(663 - 442) / 442] x 100
Subtract the new number by the original number
663 - 442 = 221
221 ÷ 442 = 0.5
0.5 x 100 = 50%
Example