1920% is the change from 15 to 303
Calculation steps:
[( 303 - 15 ) ÷ 15] x 100 = 1920%
Formula
Percentage change = [(303 - 15) / 15] x 100
Subtract the new number by the original number
303 - 15 = 288
288 ÷ 15 = 19.2
19.2 x 100 = 1920%
Example