1338.1% is the change from 21 to 302
Calculation steps:
[( 302 - 21 ) ÷ 21] x 100 = 1338.1%
Formula
Percentage change = [(302 - 21) / 21] x 100
Subtract the new number by the original number
302 - 21 = 281
281 ÷ 21 = 13.380952380952381
13.380952380952381 x 100 = 1338.1%