Answer: Marteen will paint 1/6 of her room today.
Explanation:
In order to solve this equation, all you have to do is multiply how much of her room Marteen wants to paint today (2/3) by how much of that amount she wants to paint before lunch (1/4). because she wants to paint 1/4 of 2/3 of her room before lunch, you have to multiply 2/3 and 1/4. SO...
Multiply: 1/4 x 2/3 = 2/12
Simplify: 2/12 = 1/6
Answer: 1/6
Hope this helps!