Lynne bought a bag of grapefruit, 1 1/8 pounds of apple, and 2 3/16 pound of bananas. the total weight of her purchase was 7 1/2 pound. how much did the bag of grapefruit weight?
?? grapefruit, 1 1/8 pounds of apple, and 2 3/16 lbs of bananas total wt. = 7 1/2 lbs
OK.... let's get the weight of the apples and bananas =
1 1/8 + 2 3/16
1 1/ 8 = 9/8 and 2 3/16 = 35/16
So
9/8 + 35/16 getting a common denominator of 16, we have
18/16 + 35/16 = 53/16 total lbs. of apples and bananas
So.....the weight of the grapefruit = total weight - weight of apples and bananas ....so we have
7 1/2 - 53 / 16
15/2 - 53/16 get a common denominator of 16
120/16 - 53/16 =
67 / 16 =
4 3/16 lbs of grapefruit