3123.81% is the change from 21 to 677
Calculation steps:
[( 677 - 21 ) ÷ 21] x 100 = 3123.81%
Formula
Percentage change = [(677 - 21) / 21] x 100
Subtract the new number by the original number
677 - 21 = 656
656 ÷ 21 = 31.238095238095237
31.238095238095237 x 100 = 3123.81%