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COMPARING QUANTITIES, REVISION TEST, 1. Express 12% in decimal form, 2. Evaluate the following:, (a) 20% of 400, 𝟏, , (b) 12 % of 625, 𝟐, , 3. If 20% of x is 25, then find x, 4. Express the following into per cent, (а) 1, , 𝟑, 𝟓, , (b) 2: 5, 5. There are 24% of boys in a school. If the number of girls is 456, find the, total number of students in the school., 6. The cost of 15 articles is equal to the selling price of 12 articles. Find the, profit per cent., 7. A number is increased by 20% and then it is decreased by 20%. Find the, net increase or decrease per cent., 8. Two candidates Raman and Rajan contested an election. Raman gets 46%, of the valid votes and is defeated by 1600 votes. Find the total number of, valid votes cast in the election., 9. A man whose income is ₹ 57,600 a year spends ₹ 43,200 a year. What, percentage of his income does he save?, 10.A student got 150 marks out of 200 in maths and got 120 marks out of 180, in science. In which subject did the student perform better?, 11.A person goes shopping and spends 75% of his money. If he is now left, with Rs. 600, find out how much he had in the beginning., 12.A shopkeeper bought two phones for Rs. 8,000 each. After selling the, phones, there was a loss of 4% on the 1st phone while a profit of 8% on, the 2nd phone. Calculate the overall gain or loss per cent on the whole, transaction