John buys a bag of flour.he uses 1/3 to bake a cake and 2/5 to bake a loaf what fraction of the bag of flour is left?
1/3 = 5/15
2/5 = 6/15
(15/15) - (5/15 + 6/15) = ?
To find out what fraction of the bag of flour is left, we can subtract the fractions used to bake the cake and the loaf from the whole bag of flour (1).
First, let's find the fraction of the bag used to bake the cake. John uses 1/3 of the bag for the cake.
Next, let's find the fraction of the bag used to bake the loaf. John uses 2/5 of the bag for the loaf.
To find the fraction of the bag left, we need to subtract the fractions used from 1.
1 - 1/3 - 2/5
To subtract fractions, we need to have a common denominator. The least common denominator of 3 and 5 is 15.
1 = 15/15
1/3 = 5/15 (multiplying the numerator and denominator by 5)
2/5 = 6/15 (multiplying the numerator and denominator by 3)
Now, let's subtract the fractions:
15/15 - 5/15 - 6/15 = 4/15
So, 4/15 of the bag of flour is left.