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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Ex 7.2, 3 The population of a city decreased from 25,000 to 24,500. Find the percentage decrease. Initial population = 25,000 Final population = 24,500 Decrease in population = Initial population − Final population = 25,000 − 24, 500 = 500 Percentage decrease in population = (𝐷𝑒𝑐𝑟𝑒𝑎𝑠𝑒 𝑖𝑛 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛)/(𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝑝𝑜𝑝𝑢𝑙𝑎𝑡𝑖𝑜𝑛) × 100% = 𝟓𝟎𝟎/(𝟐𝟓,𝟎𝟎𝟎) × 100% = 5/250 × 100% = 5/25 × 10% = 1/5 × 10% = 2%

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.