百份數英文例子

Q1) There are 40 students in Class A. 45% of them are boys, and the rest are girls. Find the number of boys and girls in Class A.

Q2) John's age is his father's 25%. If John is 11 years old now, then find the ages of John and his father.

Q3) Temperature increased from last night, 25c to this morning, 34c . Find the percentage change of the temperature.

Q4) A wholesaler sells a set of Hi-Fi to a retailer for 20% higher than the cost. The retailer then sells it to a customer for $6480 and makes a profit of 35%.
a) Find the cost of the set Hi-Fi for the retailer.
b) Find the cost of the st of HI-Fi for the wholesaler.
c) If the wholesaler sells the rest of Hi-Fi to the customer directly for $6000, find the percentage of the profit.

Q5) Michael buys 100 packs of tissue paper for $5 per 10 packs, and sells all of them for $2 per pack. Find the percentage of his profit.

Q6) Kenny sells a movie ticket to his friend for $6 lower than the original price, and make a loss of 10%. Find the original price of the movie ticket. and hence, find the selling price of the ticket, which Kenny sells to his friend.

Q7) Bill buys 600 oranges for $500, of which 5% are rotten. If he sells the good ones for $2 each, find the percentage of his profit.

Q8) Selling a dress for $240 will give a loss of 25%. So, to make a profit of 15%, what should be the selling price of the dress?

Q9) Peter deposits $50000 into a bank, and the simple interest rate is R%. If the simple interest rate is 8.5% and the deposit period is 6.5 years, then the interest will be $2375 less than before. Hence, find the value of R.

Q10) Kelly bought a dozen of pens at 45% discount and saved $27. Find the selling
price of each pen.