61.4% is the change from 215 to 347
Calculation steps:
[( 347 - 215 ) ÷ 215] x 100 = 61.4%
Formula
Percentage change = [(347 - 215) / 215] x 100
Subtract the new number by the original number
347 - 215 = 132
132 ÷ 215 = 0.6139534883720931
0.6139534883720931 x 100 = 61.4%