1328.57% is the change from 21 to 300
Calculation steps:
[( 300 - 21 ) ÷ 21] x 100 = 1328.57%
Formula
Percentage change = [(300 - 21) / 21] x 100
Subtract the new number by the original number
300 - 21 = 279
279 ÷ 21 = 13.285714285714286
13.285714285714286 x 100 = 1328.57%