Kevin painted
of the wall.
Solution:
Fraction of the wall painted by Elena =

Fraction of the wall painted by Matthew =

Fraction of the wall painted by Kevin = ?
Full wall can be taken as 1.
To find the wall painted by Kevin:
Rest of the wall = Full wall – painted by Elena – Painted by Matthew


To make the denominator same, multiply the numerator and denominator of the first term by 9.



Rest of the wall =

Hence the kevin painted
of the wall.