-26.57% is the change from 670 to 492
Calculation steps:
[( 492 - 670 ) ÷ 670] x 100 = -26.57%
Formula
Percentage change = [(492 - 670) / 670] x 100
Subtract the new number by the original number
492 - 670 = -178
-178 ÷ 670 = -0.2656716417910448
-0.2656716417910448 x 100 = -26.57%