3176.19% is the change from 21 to 688
Calculation steps:
[( 688 - 21 ) ÷ 21] x 100 = 3176.19%
Formula
Percentage change = [(688 - 21) / 21] x 100
Subtract the new number by the original number
688 - 21 = 667
667 ÷ 21 = 31.761904761904763
31.761904761904763 x 100 = 3176.19%