29.77% is the change from 215 to 279
Calculation steps:
[( 279 - 215 ) ÷ 215] x 100 = 29.77%
Formula
Percentage change = [(279 - 215) / 215] x 100
Subtract the new number by the original number
279 - 215 = 64
64 ÷ 215 = 0.29767441860465116
0.29767441860465116 x 100 = 29.77%