50% is the change from 302 to 453
Calculation steps:
[( 453 - 302 ) ÷ 302] x 100 = 50%
Formula
Percentage change = [(453 - 302) / 302] x 100
Subtract the new number by the original number
453 - 302 = 151
151 ÷ 302 = 0.5
0.5 x 100 = 50%
Example