4561.9% is the change from 21 to 979
Calculation steps:
[( 979 - 21 ) ÷ 21] x 100 = 4561.9%
Formula
Percentage change = [(979 - 21) / 21] x 100
Subtract the new number by the original number
979 - 21 = 958
958 ÷ 21 = 45.61904761904762
45.61904761904762 x 100 = 4561.9%