BUILDING FRACTIONS: Problem 4

Rule 17:: To build a fraction is the reverse of reducing the fraction. Instead of searching for the 1 in a fraction so that you can reduce, you insert a 1 and build.

Problem 4:: Create a fraction equivalent to that has a denominator of 40.
Answer:: There is no simple fraction with a denominator of 40 that is equivalent to the fraction. Answer is the fraction .
Solution:: The fraction is already reduced. We need an integer that when multiplied by 7 will yield 40. There is no such integer.