319.05% is the change from 21 to 88
Calculation steps:
[( 88 - 21 ) ÷ 21] x 100 = 319.05%
Formula
Percentage change = [(88 - 21) / 21] x 100
Subtract the new number by the original number
88 - 21 = 67
67 ÷ 21 = 3.1904761904761907
3.1904761904761907 x 100 = 319.05%