1720% is the change from 15 to 273
Calculation steps:
[( 273 - 15 ) ÷ 15] x 100 = 1720%
Formula
Percentage change = [(273 - 15) / 15] x 100
Subtract the new number by the original number
273 - 15 = 258
258 ÷ 15 = 17.2
17.2 x 100 = 1720%
Example