15 Divided by What Equals 18?
Methods
Setting up the problem:
In a problem like this, the “what” means that we’re working with a variable. The most common variable used in math is “x”. So we could say what number, x can we divide 15 by to equal 18?
Solving 15 Divided by What Equals 18
Here’s how you would set up this question as an equation:
15
x
=
18
\frac{15}{x} = 18
x 15 = 18
The goal of the problem is to solve for x. To do this we need to change the equation so that x is alone on one side of the equation.In this case, it can be done in two steps. The first step is to multiply both sides by x to isolate 15:
15
=
18
∗
x
15 = 18*x
15 = 18 ∗ x
Then we can isolate x on the right side of the equation by dividing both sides by 18:
15
18
=
x
\frac{15}{18} = x
18 15 = x
When we simplify the new equation, we can solve for x. In this example, we will round to the nearest three decimal places if that’s needed.
x
=
0.833
x = 0.833
x = 0.833
Practice Other Division Problems Like This One
If this problem was a little difficult or you want to practice your skills on another one, give it a go on any one of these too!
What divided by 59 equals 96?
88 divided by what equals 75?
What is 2/11 divided by 4?
What is 19/20 divided by 4/18?
What is 28 divided by 8/9?