4.47% is the change from 470 to 491
Calculation steps:
[( 491 - 470 ) ÷ 470] x 100 = 4.47%
Formula
Percentage change = [(491 - 470) / 470] x 100
Subtract the new number by the original number
491 - 470 = 21
21 ÷ 470 = 0.04468085106382979
0.04468085106382979 x 100 = 4.47%