38.6% is the change from 215 to 298
Calculation steps:
[( 298 - 215 ) ÷ 215] x 100 = 38.6%
Formula
Percentage change = [(298 - 215) / 215] x 100
Subtract the new number by the original number
298 - 215 = 83
83 ÷ 215 = 0.386046511627907
0.386046511627907 x 100 = 38.6%