-26.42% is the change from 670 to 493
Calculation steps:
[( 493 - 670 ) ÷ 670] x 100 = -26.42%
Formula
Percentage change = [(493 - 670) / 670] x 100
Subtract the new number by the original number
493 - 670 = -177
-177 ÷ 670 = -0.26417910447761195
-0.26417910447761195 x 100 = -26.42%