247.62% is the change from 21 to 73
Calculation steps:
[( 73 - 21 ) ÷ 21] x 100 = 247.62%
Formula
Percentage change = [(73 - 21) / 21] x 100
Subtract the new number by the original number
73 - 21 = 52
52 ÷ 21 = 2.4761904761904763
2.4761904761904763 x 100 = 247.62%