1380.95% is the change from 21 to 311
Calculation steps:
[( 311 - 21 ) ÷ 21] x 100 = 1380.95%
Formula
Percentage change = [(311 - 21) / 21] x 100
Subtract the new number by the original number
311 - 21 = 290
290 ÷ 21 = 13.80952380952381
13.80952380952381 x 100 = 1380.95%