-15.93% is the change from 797 to 670
Calculation steps:
[( 670 - 797 ) ÷ 797] x 100 = -15.93%
Formula
Percentage change = [(670 - 797) / 797] x 100
Subtract the new number by the original number
670 - 797 = -127
-127 ÷ 797 = -0.15934755332496864
-0.15934755332496864 x 100 = -15.93%