-15.3% is the change from 791 to 670
Calculation steps:
[( 670 - 791 ) ÷ 791] x 100 = -15.3%
Formula
Percentage change = [(670 - 791) / 791] x 100
Subtract the new number by the original number
670 - 791 = -121
-121 ÷ 791 = -0.1529709228824273
-0.1529709228824273 x 100 = -15.3%