$$\frac{15}{50}\times100\%=$$  

$$250\times\left(1-25\%\right)=$$  

$$500\times60\%\times85\%=$$  

1.) There are 50 people in the class. 20 of them are boy. What percentage of students in the class are boy?

全班有50人，男同學有20人，即男同學佔全班的百分之幾？

There are 120 passengers in the bus. 60% them are male. How many male passengers in the bus?

巴士上有120人，其中男乘客是全部的60%，問男乘客有多少人？

There are 20 people the lift. 18 of them are adults. What percentage of people are children?

電梯內有20人，成人佔了18人，小童佔全部的百分之幾？

There were 48 kg of pork in a shop. 80% of the pork was sold today. How many kilograms of pork were sold?

肉檔原有 48 公斤豬肉，今天售出其中的 80%，即售出豬肉多少公斤？

1.) There are 200 pieces of candy in a box. 25% of them are red. 30% of them are yellow. 35% of them are blue, the others are pink.How many blue candies more than red candies?

一盒糖果有200粒，紅色佔25%，黃色佔30%，藍色佔35%，其餘的便是粉紅色。藍色比紅色多多少粒？

There are 40 students in P6B and 75% of them are boys. 60% of boy is love mathematics. How many boys love mathematics? 6B班有40人，其中男學生佔75%，在男學生中有60%是喜歡數學的，問有多少名男生喜歡數學呢？

The original price of a toy rocket was $180. It is now sold at a 50% discount. If it is bought with the VIP card, how much should be paid?(VIP card have an extra 10% discount)

玩具火箭一枝，原價 180 元，現五折出售，用貴賓卡購買，應付多少元？(貴賓咭可獲額外九折)

The original price of a packet of potato chips was $2.50 . Now, 5 packets of potato chips are sold at $10. What is the percentage discount of buying 5 packets of potato chips?薯片每包原價 2.5 元，現 10 元可買 5 包。買 5 包薯片的折扣是多少？

What is the percentage of the shaded area to the whole figure? 陰影部份佔全部的百分之幾?

Olivia completed 85% of the Math questions. She still has 6 questions left. How many questions were there in total? 家二完成了85%的題目，還有6題未完成。請問題目共有多少題？

買三送一即是多少折？

What is the discount of buy 3 get 1 free?

波鞋一對原價$1500元，現以九折出售，求售價。

The original price a pair of sport shoes is $1500. It was sold at 10% off. What is the selling price?

購買球拍一塊可享九折優惠，購買兩塊或以上可享額外九折優惠。一塊球拍原價500元，若同時購買3塊，即便宜了多少元？Buy one racket to enjoy a 10% discount, and purchase two or more to enjoy an additional 10% discount. The original price of a racket is $500 . If you buy three at the same time, how much is cheaper?