1090.48% is the change from 21 to 250
Calculation steps:
[( 250 - 21 ) ÷ 21] x 100 = 1090.48%
Formula
Percentage change = [(250 - 21) / 21] x 100
Subtract the new number by the original number
250 - 21 = 229
229 ÷ 21 = 10.904761904761905
10.904761904761905 x 100 = 1090.48%