a cook needs 1 1/2 cups of sugar. the cook has 3/8 cup. how many more cups of sugar does the cook need
When adding or subtracting fractions, we must have equivalent fractions with the same denominator.
1 1/2 = 1 4/8
(1 4/8) - (3/8) = 1 1/8 cups
To find out how many more cups of sugar the cook needs, we need to subtract the amount the cook already has from the amount the cook needs.
The cook needs 1 1/2 cups of sugar, which is the same as 1 + 1/2 = 2/2 + 1/2 = 3/2 cups of sugar.
The cook already has 3/8 cup of sugar.
To subtract fractions, we need to find a common denominator. In this case, the common denominator is 8.
So, we have 3/2 - 3/8.
To subtract fractions with the same denominator, we subtract the numerators and keep the denominator the same.
3/2 - 3/8 = (3 - 3)/8 = 0/8 = 0.
Therefore, the cook doesn't need any more cups of sugar because the cook already has enough (3/8 cup) to make 1 1/2 cups of sugar.