**Question 1:**
Express $30:25$
as a fraction in its lowest terms

**Question 2:**
Express $175:25$
in the lowest term

**Question 3:**
Express $10ml:1l$
as a fraction in its lowest term

**Question 4:**
Simplify ratio $1.5:2$

**Question 5:**
Simplify ratio: $3.2:4$

**Question 6:**
Reduce a ratio $3:10$
to the form $1:n$

**Question 7:**
Reduce a ratio $7:17$
to the form $1:n$

**Question 8:**
Divide $100$
in the ratio $3:7$

**Question 9:**
Divide $289$
in the ratio $1:7:9$

**Question 10:**
$3$
books cost $\pounds 13.20$
. How much cost $2$
books?