Question

If 3/10 = 30/100 than 4/10 = ?/100

Answer 1

I'm pretty sure 4/10=40/100

Answer 2

Here is the equation:

`(3)/(10) = (30)/(100) \rightarrow (4)/(10)  =(x)/(100)`

To find the missing number, you have to cross multiply. Here's the equation:

`(4)/(10) = (x)/(100) \\ \\ 100 * 4 = 10x`

Multiply:

`100 * 4 = 400 \\ 400 = 10x`

To leave the variable x alone, you need to divide both sides by 10

`(400)/(10) = (10x)/(10)`

Divide:

`400 / 10 = 40 \\ x = 40`

Your answer is 40

If you have any questions, feel free to ask in the comments! :)