Question

The value of x is decreased by 40%. Which expression can be used to represent thissituation?А0.4xB0.6%С1- 0.4%D1 -0.6xОА

Answer 1

Let's define:

y: new value

x: previous value

Given that the value of x is decreased by 40%, then:

`\begin{gathered} (y-x)/(x)\cdot100=-40 \\ (y-x)/(x)=-(40)/(100) \\ y-x=-0.4x \\ y=-0.4x+x \\ y=0.6x \end{gathered}`

Choice B represents the situation