1580% is the change from 20 to 336
Calculation steps:
[( 336 - 20 ) ÷ 20] x 100 = 1580%
Formula
Percentage change = [(336 - 20) / 20] x 100
Subtract the new number by the original number
336 - 20 = 316
316 ÷ 20 = 15.8
15.8 x 100 = 1580%
Example