Why might you want to write a ratio as a decimal?

Sometimes if you write a ratio as a decimal, it’s easier to line up different numbers in math when you were adding, dividing, multiplying, and all that sort of stuff! Hope it helps!

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

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step-by-step explanation: