34% is the change from 300 to 402
Calculation steps:
[( 402 - 300 ) ÷ 300] x 100 = 34%
Formula
Percentage change = [(402 - 300) / 300] x 100
Subtract the new number by the original number
402 - 300 = 102
102 ÷ 300 = 0.34
0.34 x 100 = 34%
Example