6.6% is the change from 288 to 307
Calculation steps:
[( 307 - 288 ) ÷ 288] x 100 = 6.6%
Formula
Percentage change = [(307 - 288) / 288] x 100
Subtract the new number by the original number
307 - 288 = 19
19 ÷ 288 = 0.06597222222222222
0.06597222222222222 x 100 = 6.6%