2760% is the change from 15 to 429
Calculation steps:
[( 429 - 15 ) ÷ 15] x 100 = 2760%
Formula
Percentage change = [(429 - 15) / 15] x 100
Subtract the new number by the original number
429 - 15 = 414
414 ÷ 15 = 27.6
27.6 x 100 = 2760%
Example