Answer:
The answer is "Gavin combined paint to
to produce 2 mango paint containers".
Explanation:
For the development of Mango shade, Gavin used the red and the yellow colour. He wants to add one batch:

Foe 2 batches:

Solve the equation in two parts:
First Solving the whole numbers:

Second Solving the fractions part :

Gavin combined paint to
to produce 2 mango paint containers.