2273.33% is the change from 15 to 356
Calculation steps:
[( 356 - 15 ) ÷ 15] x 100 = 2273.33%
Formula
Percentage change = [(356 - 15) / 15] x 100
Subtract the new number by the original number
356 - 15 = 341
341 ÷ 15 = 22.733333333333334
22.733333333333334 x 100 = 2273.33%