FORM 1 MATHEMATICS
RATIOS, PROPORTIONS AND PERCENTS
ALL WORKING MUST BE CLEARLY SHOWN.
1. Simplify the following in whole number format: a) 28:49 b) 6.4: 3.6
2. Express the following ratios in the form 1: k, where k is a fraction:
a) 2:3
b) 5:9
3. The weight of two parcels is in the ratio 5:7. if the smaller parcel weighs 16kg,
what is the weight of the larger parcel?
4. The angles in a triangle are in the ratio 4:5:9. The sum of the angles is 180
degrees.
A) Find the smallest angle of the triangle.
B) Find the ratio of the smallest angle to the sum of angles of the triangle.
C) calculate the percentage of the smallest angle. Hint. Use the ratio from B.
5. Ben earns $12,800 a year. About 15% is taken out for taxes.
How much is taken out for taxes?