John is a quarterback. This year, he completed 350 passes, which is 70%, percent of all the passes he's attempted this year.

How many passes has John attempted this year?

To find out how many passes John has attempted this year, we can use the percentage given. We know that 350 passes is 70% of the total passes attempted.

Let's set up a proportion to solve for the total number of passes attempted:

(350 passes) / (x) = (70%) / (100%)

To solve for x, we can cross-multiply:

350 * 100% = x * 70%

Simplifying, we have:

35000 = 70x

To isolate x, we will divide both sides of the equation by 70:

35000 / 70 = x

Therefore, John has attempted 500 passes this year.

70% of passes = 350

.7x = 350
x = 350/0.7 = ....