By Michal Paszkiewicz.

# Number - Fractions, decimals and percentages

**Please do not use a calculator!**
Try all the questions, but if you struggle with one too much, move on to the next one.

### 1. Change these numbers into decimals:

- \( \frac{6}{25} \)
- \( \frac{1}{8} \)
- \( \frac{14}{5} \)
- \( 1234% \)

### 2. Change these numbers into fractions:

- \( 0.15 \)
- \( 0.\dot{2} \)
- \( 85% \)
- \( 0.3\dot{4} \)

### 3. Change these numbers into percentages:

- \( 0.254 \)
- \( \frac{7}{40} \)
- \( 3.14 \)
- \( 0.00459 \)

### 4. After increasing his initial population of alligators by 20% (by breeding), Bob has 5 million alligators. How many alligators did Bob have before he bred them:

### 5. After breeding his alligators, Bob sells off half of them. While selling them off, he forgot to feed a fifth of the remaining alligators, so they died. They were promptly eaten by the other alligators. These alligators became so bloodthirsty that they started eating each other and so 0.5 of these alligators were killed in the ensuing struggle. How many alligators were left?