Get live Maths 1-on-1 Classs - Class 6 to 12
Example 17 - Chapter 8 Class 7 Comparing Quantities
Last updated at March 23, 2023 by Teachoo
Examples
Example 1
Example 2
Example 3 Important
Example 4 Important
Example 5
Example 6 Important
Example 7
Example 8 Important
Example 9 Important
Example 10 (a)
Example 10 (b) Important
Example 10 (c)
Example 11
Example 12
Example 13 Important
Example 14 Important
Example 15
Example 16
Example 17 Important You are here
Example 18 Important
Example 19
Example 20 Important
Example 21 Important
Transcript
Example 17 The number of illiterate persons in a country decreased from 150 lakhs to 100 lakhs in 10 years. What is the percentage of decrease? Initial number of illiterate people = 150 lakhs Number of illiterate people after 10 years = 100 lakhs Decrease in number of illiterate people = 150 − 100 = 50 lakhs Percentage decrease = (𝐷𝑒𝑐𝑟𝑒𝑎𝑠𝑒 𝑖𝑛 𝑛𝑢𝑚𝑏𝑒𝑟 )/(𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟) × 100% = 50/150 × 100% = 5/15 × 100% = 1/3 × 100% = 100/3 % = 33 𝟏/𝟑 %
