3076.19% is the change from 21 to 667
Calculation steps:
[( 667 - 21 ) ÷ 21] x 100 = 3076.19%
Formula
Percentage change = [(667 - 21) / 21] x 100
Subtract the new number by the original number
667 - 21 = 646
646 ÷ 21 = 30.761904761904763
30.761904761904763 x 100 = 3076.19%