Joan wants to share R1 245,00 in the ratio 2:3 between Thabo and Valois. Calculate: 1.4.1 How much will Thabo get. 1.4.2 How much will Valois get.

Factors of 108: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108.
Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56.
The GCD is 4.

The simplified ratio is $\boxed{27:14}$.

1.1.2

Factors of 150: 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 150.
Factors of 180: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180.
The GCD is 30.

The simplified ratio is $\boxed{5:6}$.

1.2 Write the following as unit ratios:

1.2.1

The unit ratio is $\boxed{1:4}$.

1.2.2

The unit ratio is $\boxed{1:\frac{23}{3}}$.

1.3
A new green colour of paint is made by mixing blue paint and yellow paint in the ratio $4:3$. If you have 12 litres of blue paint, how many litres of yellow paint do I need to make up the new green colour?

You need $\boxed{9 \text{ litres}}$ of yellow paint.

1.4 Joan wants to share R1 245,00 in the ratio 2:3 between Thabo and Valois.

1.4.1 How much will Thabo get?

Thabo will get $\boxed{\text{R}498.00}$.

1.4.2 How much will Valois get?

Alternatively, subtract Thabo's amount from the total:

Valois will get $\boxed{\text{R}747.00}$.