Answer:
45%
Explanation:
To solve this, we can turn it into a fraction. 18/40. If we are trying to determine what percentage he spent on fruit out of the money he spent at the grocery store, then we will divide the denominator (40) by the numerator (18). 18 divided by 40 is 0.45. Next, we multiply 0.45 by 100, which leaves us with 45%. Justin spent 45% on the fruit.