Answer :

Sure, let's break this down step-by-step.

### Part (a): Which number in the ratio represents Stefan's share?

The ratio given is [tex]\( 5:9 \)[/tex]. In a ratio [tex]\( a:b \)[/tex]:

- The first number, [tex]\( a \)[/tex], represents the first entity.
- The second number, [tex]\( b \)[/tex], represents the second entity.

Here, the first number in the ratio [tex]\( 5:9 \)[/tex] is 5. This number represents Stefan's share. Hence, Stefan's share in the ratio is 5.

### Part (b): Who will get more money?

To determine who gets more money, we compare the two numbers in the ratio [tex]\( 5:9 \)[/tex]:

- Stefan's share is represented by 5.
- Ronan's share is represented by 9.

Since 9 is greater than 5, Ronan will get more money than Stefan.

### Summary

- (a) Stefan's share is represented by the number 5 in the ratio.
- (b) Ronan will get more money.