Percentages1/25/2024 ![]() Find the percentage of distance travelled by train in 3 hours. When the distance traveled is compared with the total time, the distance traveled per unit time is obtained.Ī train travels 1000 km in 5 hours.When the total cost is compared with the number of items purchased, cost per item is obtained.In solving problems through the unitary method, two different things are compared as explained below: ![]() The word unitary is derived from the word “unit” which means “one.Ī unitary method is a method in which the value of a unit quantity is first derived to find the value of any required quantity. Find the percentage of boys and girls in the class. In a class of 50 students, the ratio of the number of boys to the number of girls is 3: 2. This implies that ratios are being converted into percentages. The comparison becomes more convenient if the denominator is 100. to compare them first of all, a common denominator is needed. Ratios when expressed as fractions can have different denominators in their simplest form. Converting a Fraction or a Ratio into a Percentage How much does he save every month?Īmount spent on food and other items = £(60% of 12000) Out of this, he spends 60% of food and other items of daily need, 10% on rent and 5% on petrol for his scooter. Hence Alice paid £20,400 for the computer. ![]() Regular price of notebook computer = £25,500Īmount paid by Alice = Regular Price – Discount How much discount did Alice get? How much did she pay for the computer? Alice bought it from an online shopping site, which was selling it at a 20% discount on the regular price. The regular price of a computer was £25,500. Number of pages that were left = 75% of 24 Silvia had completed 25% of 24 pages by the evening. By the evening, she had completed 25% of her work. Number of girls in the school = 600 – 360 = 240 Example 2 Therefore, number of boys in the school = 360 How many girl students are there in the school? Everyday Life Problems Involving Use of Percentage Example 1 Thus 44 per cent will be written as 44%.Īs Peter’s percentage is more than Henry’s, his performance is better. You can say that 44 per cent of the squares are shaded.įor per cent, we use the symbol “%”. Per cent means per hundred, as cent means hundred. When a fraction has 100 as the denominator, we call it a percentage. You can also say that 44 squares per hundred are shaded. There are 44 shaded small squares in this square. The shaded squares will always be a fraction of 100.
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