28.7% is the change from 216 to 278
Calculation steps:
[( 278 - 216 ) ÷ 216] x 100 = 28.7%
Formula
Percentage change = [(278 - 216) / 216] x 100
Subtract the new number by the original number
278 - 216 = 62
62 ÷ 216 = 0.28703703703703703
0.28703703703703703 x 100 = 28.7%