7.34% is the change from 286 to 307
Calculation steps:
[( 307 - 286 ) ÷ 286] x 100 = 7.34%
Formula
Percentage change = [(307 - 286) / 286] x 100
Subtract the new number by the original number
307 - 286 = 21
21 ÷ 286 = 0.07342657342657342
0.07342657342657342 x 100 = 7.34%