mario took inventory of fish food in his store. there were 1 5/8 pounds of goldfish food, 9/16 pounds of beta food, and 17/20 pounds of tropical fish food. about how many pounds of fish food were there in all?
3 pounds
2 1/2 pounds
2 pounds
1 1/2 pounds
The answer is about 3. You find a common denominator of 80 and add 130/80+45/80+68/80 to get 243/80 which equals 3.0379
To find the total amount of fish food, we need to add the quantities of goldfish food, beta food, and tropical fish food.
First, let's convert all the fractions to a common denominator.
1 5/8 pounds of goldfish food can be written as 13/8 pounds.
9/16 pounds of beta food remains the same.
17/20 pounds of tropical fish food remains the same.
Now, we can add these quantities together:
13/8 + 9/16 + 17/20
To add fractions with different denominators, we need to find a common denominator. In this case, the least common multiple of 8, 16, and 20 is 80.
Now, let's convert each fraction to have a denominator of 80:
(13/8) * (10/10) = 130/80
(9/16) * (5/5) = 45/80
(17/20) * (4/4) = 68/80
Adding these fractions together:
130/80 + 45/80 + 68/80 = 243/80
Now, let's simplify this fraction. The greatest common divisor (GCD) of 243 and 80 is 1, so we can't simplify it further.
So, the total amount of fish food is 243/80 pounds.
To convert this fraction to a mixed number, divide the numerator (243) by the denominator (80):
243 ÷ 80 = 3 remainder 3
The mixed number is then 3 3/80 pounds.
Since we are rounding the answer, we round 3 3/80 pounds to the nearest whole pound, which is 3 pounds.
Therefore, the approximate total amount of fish food is 3 pounds. Therefore, the correct answer is 3 pounds.