-27.46% is the change from 670 to 486
Calculation steps:
[( 486 - 670 ) ÷ 670] x 100 = -27.46%
Formula
Percentage change = [(486 - 670) / 670] x 100
Subtract the new number by the original number
486 - 670 = -184
-184 ÷ 670 = -0.2746268656716418
-0.2746268656716418 x 100 = -27.46%