63.26% is the change from 215 to 351
Calculation steps:
[( 351 - 215 ) ÷ 215] x 100 = 63.26%
Formula
Percentage change = [(351 - 215) / 215] x 100
Subtract the new number by the original number
351 - 215 = 136
136 ÷ 215 = 0.6325581395348837
0.6325581395348837 x 100 = 63.26%