16.09% is the change from 491 to 570
Calculation steps:
[( 570 - 491 ) ÷ 491] x 100 = 16.09%
Formula
Percentage change = [(570 - 491) / 491] x 100
Subtract the new number by the original number
570 - 491 = 79
79 ÷ 491 = 0.16089613034623218
0.16089613034623218 x 100 = 16.09%