Percent and Percentage — Important Questions
ICSE · Class 7 · Mathematics
60 important questions from Percent and Percentage for ICSE Class 7 Mathematics, with answers. Includes multiple choice and true false questions.
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Important Questions from Percent and Percentage
A cake is 25% eaten and 35% given away. What percent of the cake is still left?
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40%
Step 1: Total used = 25% + 35% = 60%. Step 2: Cake left = 100% - 60% = 40%. So, 40% of the cake is still left.
A student gets 33% of the maximum marks in an examination of 900 marks and fails by 45 marks. What are the passing marks?
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342 marks
Step 1: Marks scored = 33% of 900 = 297. Step 2: Fails by 45 marks, so passing marks = 297 + 45. Step 3: 297 + 45 = 342. So, the passing marks are 342.
An ore contains 20% zinc. How many kilograms of ore are needed to get 45 kg of zinc?
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225 kg
Step 1: Let the ore needed be x kg. Step 2: 20% of x = 45. Step 3: (20/100) × x = 45. Step 4: x = 45 × 100 ÷ 20 = 225. So, 225 kg of ore is needed.
A basket has 250 mangoes. 12% are rotten and 10% of the remaining mangoes are crushed. How many mangoes are in good condition?
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198
Step 1: Rotten mangoes = 12% of 250 = 30. Step 2: Remaining mangoes = 250 - 30 = 220. Step 3: Crushed mangoes = 10% of 220 = 22. Step 4: Good mangoes = 220 - 22 = 198. So, 198 mangoes are in good condition.
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