34.33% is the change from 300 to 403
Calculation steps:
[( 403 - 300 ) ÷ 300] x 100 = 34.33%
Formula
Percentage change = [(403 - 300) / 300] x 100
Subtract the new number by the original number
403 - 300 = 103
103 ÷ 300 = 0.3433333333333333
0.3433333333333333 x 100 = 34.33%