2100% is the change from 13 to 286
Calculation steps:
[( 286 - 13 ) ÷ 13] x 100 = 2100%
Formula
Percentage change = [(286 - 13) / 13] x 100
Subtract the new number by the original number
286 - 13 = 273
273 ÷ 13 = 21
21 x 100 = 2100%
Example