Applications of ratio and proportion
Answers are for parents and teachers.
1
Two towns are 12 km apart. How far apart are they on a map with the scale 1 : 400,000?
12 km = 1,200,000 cm and 1,200,000 ÷ 400,000 = 3 cm.
2
Share 840 LE in the ratio 3 : 4.
7 parts, one part 120 LE. Shares: 360 LE and 480 LE.
3
Three brothers share 480 LE in the ratio 1 : 2 : 5. How much does each get?
8 parts, one part 60 LE. Shares: 60 LE, 120 LE and 300 LE.
4
A bicycle costs 800 LE and has a 35% discount. How much do you pay?
Discount = 800 × 35/100 = 280 LE. You pay 800 − 280 = 520 LE.
5
A television costs 1,140 LE including 14% sales tax. What was the price before tax?
1,140 is 114% of the price. 1,140 ÷ 114 × 100 = 1,000 LE.