1740% is the change from 15 to 276
Calculation steps:
[( 276 - 15 ) ÷ 15] x 100 = 1740%
Formula
Percentage change = [(276 - 15) / 15] x 100
Subtract the new number by the original number
276 - 15 = 261
261 ÷ 15 = 17.4
17.4 x 100 = 1740%
Example