May decorated 7/10 of her cupcakes with chocolate frosting, and the rest with vanilla frosting, what percent of her cupcakes were decorated with vanilla frosting?

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:

yes

step-by-step explanation: