## snowballhockey 2 years ago The has tank in hana's car holds 15 1/2 gallons. if hana used 3/4 of a tank of gas when she drove across Arizona , how many gallons of gas did she use on that trip

1. snowballhockey

The gas

2. Leonhart

Convert to decimal, multiply, covert back to fraction.

3. snowballhockey

Is it subtraction the problem

4. snowballhockey

Leonhart

5. Leonhart

No. Your simply trying to figure out what 3/4 is of 15 1/2. Convert to decimal. 15.50 0.75 Multiply. 15.5 * .75 Convert to fraction.

6. Leonhart

7. snowballhockey

So 11 1/4

8. Leonhart

15.5 * .75 = 11.625 11 1/4 would = 11.25

9. snowballhockey

Can u do that in fractions not decmials

10. Leonhart

11. snowballhockey

So u would do 15 1/2 equals 31/2 then muiltply that to 3/4 and then get 93/8 then get 11 4/8 simplfy equals 11 1/4 tell me what i did wrong

12. Leonhart

First, convert the fractions (15 1/2 & 3/4) to decimals. Then multiply the two together. (15.5 * .75) Then convert the decimal to a fraction. (11.625 = 11 5/8)

13. Leonhart

If you don't want to convert to decimals and back into a fraction you can simply multiply the fractions. Whatever works best for you. Multiplying the fractions: Convert 15 1/2 to a improper fraction. = 31/2 Multiply 31/2 by 3/4. = 93/8 Covert/simplify that into a mixed number. = 11 5/8