62.79% is the change from 215 to 350
Calculation steps:
[( 350 - 215 ) ÷ 215] x 100 = 62.79%
Formula
Percentage change = [(350 - 215) / 215] x 100
Subtract the new number by the original number
350 - 215 = 135
135 ÷ 215 = 0.627906976744186
0.627906976744186 x 100 = 62.79%