-73.73% is the change from 670 to 176
Calculation steps:
[( 176 - 670 ) ÷ 670] x 100 = -73.73%
Formula
Percentage change = [(176 - 670) / 670] x 100
Subtract the new number by the original number
176 - 670 = -494
-494 ÷ 670 = -0.7373134328358208
-0.7373134328358208 x 100 = -73.73%