30.86% is the change from 243 to 318
Calculation steps:
[( 318 - 243 ) ÷ 243] x 100 = 30.86%
Formula
Percentage change = [(318 - 243) / 243] x 100
Subtract the new number by the original number
318 - 243 = 75
75 ÷ 243 = 0.30864197530864196
0.30864197530864196 x 100 = 30.86%