30.9% is the change from 288 to 377
Calculation steps:
[( 377 - 288 ) ÷ 288] x 100 = 30.9%
Formula
Percentage change = [(377 - 288) / 288] x 100
Subtract the new number by the original number
377 - 288 = 89
89 ÷ 288 = 0.3090277777777778
0.3090277777777778 x 100 = 30.9%