-62.09% is the change from 670 to 254
Calculation steps:
[( 254 - 670 ) ÷ 670] x 100 = -62.09%
Formula
Percentage change = [(254 - 670) / 670] x 100
Subtract the new number by the original number
254 - 670 = -416
-416 ÷ 670 = -0.6208955223880597
-0.6208955223880597 x 100 = -62.09%