19.1% is the change from 670 to 798
Calculation steps:
[( 798 - 670 ) ÷ 670] x 100 = 19.1%
Formula
Percentage change = [(798 - 670) / 670] x 100
Subtract the new number by the original number
798 - 670 = 128
128 ÷ 670 = 0.191044776119403
0.191044776119403 x 100 = 19.1%