You have to make the sum hav the numerator larger that the denominator

A proper fraction is a fraction whose numerator is less than the denominator. An improper fraction is one whose numerator is more than the denominator. To convert a proper fraction to an improper fraction, you need to increase the magnitude of its value--make it be something it isn't.

To convert a mixed number to an improper fraction, you add the fraction numerator to the integer times the denominator.

a + b/c = (ac + b)/c

1 2/3 = (1*3 + 2)/3 = 5/3

To convert a mixed number to an improper fraction, you add the fraction numerator to the integer times the denominator.

a + b/c = (ac + b)/c

1 2/3 = (1*3 + 2)/3 = 5/3