A unit fraction is one of the form 1/a where ‘a’ is a natural number ≠1. Any proper fraction can be written as the sum of two or more unit fractions.{Ex. 1/2 = 1/3 + 1/6 5/6 = 1/2 + 1/3 1/24 = 1/54 + 1/72 + 1/108. In the case of 1/2 the factors of 2 are 1 and 2 only1/2 = 1+2/21+2 = 1/21+2 + 2/21+2 = 1/6 + 1/3} Express 1/15 as the sum of two different unit fraction in 4 different ways