-81.04% is the change from 670 to 127
Calculation steps:
[( 127 - 670 ) ÷ 670] x 100 = -81.04%
Formula
Percentage change = [(127 - 670) / 670] x 100
Subtract the new number by the original number
127 - 670 = -543
-543 ÷ 670 = -0.8104477611940298
-0.8104477611940298 x 100 = -81.04%