18.06% is the change from 670 to 791
Calculation steps:
[( 791 - 670 ) ÷ 670] x 100 = 18.06%
Formula
Percentage change = [(791 - 670) / 670] x 100
Subtract the new number by the original number
791 - 670 = 121
121 ÷ 670 = 0.18059701492537314
0.18059701492537314 x 100 = 18.06%