1813.33% is the change from 15 to 287
Calculation steps:
[( 287 - 15 ) ÷ 15] x 100 = 1813.33%
Formula
Percentage change = [(287 - 15) / 15] x 100
Subtract the new number by the original number
287 - 15 = 272
272 ÷ 15 = 18.133333333333333
18.133333333333333 x 100 = 1813.33%