31.25% is the change from 288 to 378
Calculation steps:
[( 378 - 288 ) ÷ 288] x 100 = 31.25%
Formula
Percentage change = [(378 - 288) / 288] x 100
Subtract the new number by the original number
378 - 288 = 90
90 ÷ 288 = 0.3125
0.3125 x 100 = 31.25%
Example