13.37% is the change from 591 to 670
Calculation steps:
[( 670 - 591 ) ÷ 591] x 100 = 13.37%
Formula
Percentage change = [(670 - 591) / 591] x 100
Subtract the new number by the original number
670 - 591 = 79
79 ÷ 591 = 0.13367174280879865
0.13367174280879865 x 100 = 13.37%