Question

Raju painted 2/3 of the wall space in his room. His brother Rahul helped and painted 1/7 the wall space. How much did they paint together? What part of the whole space is left unpainted?

Answer 1

Answer:

sorry answer is they painted 4/5

Answer 2

Answer:

the total they painted =

$\frac{2}{3} + \frac{1}{7} = \frac{14 + 3}{21} = \frac{17}{21}$

space left =

$1 - \frac{17}{21} = \frac{4}{21}$

$\frac{4}{21} wall \: space \: is \: left$