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(/1.5)Q1: Fill in the blanks.compares two or more quantities of the same kind.il.Per means forIll. It is necessary to give thefor weight and money.Q2: Do the following.(/1.5)A man can write 1800 words in 1 hour Find the number ofwords that he can write in per minute.ILFor each ornament that a worker makes, he is paid $ 1.15.Hemakes 4 ornaments every 15 minutes. Find the amountearned by the worker if he works for 3 hours.(72) |
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Answer» Answer: To compare two quantities, their units must be the same. • Two RATIOS can be compared by converting them into like fractions. If the two fractions are equal, we say that the two given ratios are equivalent. • If two ratios are equivalent (or equal), then the involved four quantities are said to be in proportion. • One of the WAYS of comparing quantities is percentage. Per cent is derived from Latin word ‘per CENTUM’ meaning ‘per HUNDRED’. • Percent is represented by the symbol % and means hundredth too. • Fractions can be converted into percentages and vice-versa. • Decimals can also be converted into percentages and vice-versa. • The buying price of any item is known as its COST price. It is written in short as CP. • The price at which an item is sold, is known as its selling price or in short SP. • If CP < SP, then a profit is made and Profit = SP – CP. • If CP = SP, there is no profit or loss. • If CP > SP, then a loss is made and Loss = CP – SP. • Profit per cent = Profit ×100 CP • Loss per cent = Loss ×100 CP |
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