8.1% is the change from 284 to 307
Calculation steps:
[( 307 - 284 ) ÷ 284] x 100 = 8.1%
Formula
Percentage change = [(307 - 284) / 284] x 100
Subtract the new number by the original number
307 - 284 = 23
23 ÷ 284 = 0.08098591549295775
0.08098591549295775 x 100 = 8.1%