Answer: 5/8
Explanation:
To do this you have to add the weight of each purchase
But in order to add them together, there has to be a common denominator.
In order to do this, you can multiply both the numerator and denominator of 1/4 by 2 to get a denominator of 8 as seen below:
Now you can add them to get your final answer: When you are adding fractions with common denominators, simply add the numerators together and keep the denominator.