PROPORTIONALITY AND PERCENTAGES 1

• YES

• NO

• YES

• NO

A car uses 5 liters of petrol to travel 100 miles. How far will the car travel using 28 liters of petrol?

• THEY ARE DIRECTLY PROPORTIONAL

• THEY ARE INVERSELY PROPORTIONAL

SOLVE:

A car uses 5 liters of petrol to travel 100 miles. How far will the car travel using 28 liters of petrol?

5 workers built a wall in fifteen days. How long will it take to build the wall

with 3 workers?

• THEY ARE DIRECTLY PROPORTIONAL

• THEY ARE INVERSELY PROPORTIONAL

SOLVE:

5 workers built a wall in fifteen days. How long will it take to build the wall

with 3 workers?

CALCULATE 25% OF 40

Prices of t-shirts have increased 25% from five months ago. In that moment, I paid 40 euros for my t-shirt. How much would I have to pay today?

In the shop where I am used to buying my clothes, there are 25% sales today. I have paid 40 euros for T-shirt. What was its price before sales?