Answer: 23 ounces = 1.4375 pounds
Step-by-step explanation:
First, you have to turn the mixed number of the backpack initial weight into a whole number:
[tex]2 \frac{1}{4}=\frac{(2*4)+1}{4} =\frac{9}{4}[/tex]
Then, you can either convert the weight of the backpack to ounces or you can convert the weight of the book to pounds.
1 pound = 16 ounces
Then, the weight of the backpack in ounces would be:
[tex]\frac{9}{4}*16=36[/tex]
Finally, you subtract the initial weight of the backpack and the weight of the book removed:
[tex]36-13=23 ounces[/tex]
If you want the result in pounds:
[tex]\frac{23}{16}=1.4375 pounds[/tex]
