**Exercise 12.1**

**1. Write each of the following as percent:**

**(i) Solution: **

** **

= 62.5%

**(iv) 0.8**

** **= 0.8 (100)

= 80%

**(v) 0.005**

** **= 0.005 (100)

= 0.5%

**(vi) 3:25**

**(vii) 11:80**

** **= 13.75%

**(viii) 111:125**

**(ix) 13:75**

**(x) 15:16**

** ****(xi) 0.18**

** **= 0.18(100)

= 18%

**2. Convert the following percentages to fractions and ratios:**

**Solution: **

**(i) 25%**

**(ii) 2.5%**

**(iii) 0.3%**

**(iv) 125%**

**3. Express the following as decimal fractions:**

**Solution:**

**(i) 27%**

**(ii) 6.3%**

**(iii) 32%**

**(iv) 0.25 **

**(v) 7.5%**