2300% is the change from 13 to 312
Calculation steps:
[( 312 - 13 ) ÷ 13] x 100 = 2300%
Formula
Percentage change = [(312 - 13) / 13] x 100
Subtract the new number by the original number
312 - 13 = 299
299 ÷ 13 = 23
23 x 100 = 2300%
Example