78.6% is the change from 215 to 384
Calculation steps:
[( 384 - 215 ) ÷ 215] x 100 = 78.6%
Formula
Percentage change = [(384 - 215) / 215] x 100
Subtract the new number by the original number
384 - 215 = 169
169 ÷ 215 = 0.786046511627907
0.786046511627907 x 100 = 78.6%