45% is the change from 300 to 435
Calculation steps:
[( 435 - 300 ) ÷ 300] x 100 = 45%
Formula
Percentage change = [(435 - 300) / 300] x 100
Subtract the new number by the original number
435 - 300 = 135
135 ÷ 300 = 0.45
0.45 x 100 = 45%
Example