F.1 Maths ~ Percentages

1) The distance between islands A and B is 90km, and the distance between islands B and C is 60km. What percentage of the total distance between A and C through B is the distance between B and C?

2) Dickson used 24cm of a piece of sreing. If half of the remaining piece of string is 52cm long, what percentage of the original string was used?

3) Mrs.Lee bought 30 gifts. She bought 4 gifts from a department store and 2 gifts from a ststionery shop. What percentage of the gifts was not bought from a department store or a stationery shop?

4) Class 1A has 35 students. 20% of them failed an examination. Among those students who passed the examination, 25% of them got full marks. Find the number of students who got full marks.

5) 75 engineers are working on the same construction project. 40% of them are female. If 80% of the male engineers are junior engineers, find the number of male junior engineers.

6) Ricky has 60 marbles. 10% of them are red, 30% are yellow, and the rest are blue. If 50% of the blue marbles are marked with stars, find the number of blue marbles with stars.