2213.33% is the change from 15 to 347
Calculation steps:
[( 347 - 15 ) ÷ 15] x 100 = 2213.33%
Formula
Percentage change = [(347 - 15) / 15] x 100
Subtract the new number by the original number
347 - 15 = 332
332 ÷ 15 = 22.133333333333333
22.133333333333333 x 100 = 2213.33%