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Ex 7.1, 3 - Chapter 7 Class 8 Comparing Quantities
Last updated at Dec. 16, 2024 by Teachoo
Chapter 7 Class 8 Comparing Quantities
Concept wise
-
Ratios & Percentages
- Finding Increase or Decrease Percent
- Finding Discounts
- Finding cost price, selling price, profit % , loss%
- Sales Tax and Value Added Tax
- Simple Interest
- Compound Interest
- Compound Interest compounded half yearly
- Compound Interest for fraction years
- Applications of Compound Interest Formula
Transcript
Ex 7.1, 3 72% of 25 students are good in mathematics. How many are not good in mathematics?Given, Total Students = 25 Percentage of Students good in mathematics = 72 % Now, Percentage of Students not good in mathematics = 100% โ 72% Percentage of Students not good in mathematics = 28% Finding number of students not good in mathematics Let Number of Students not good in Mathematics = x Percentage = (๐๐ข๐๐๐๐ ๐๐ ๐ ๐ก๐ข๐๐๐๐ก๐ ๐๐๐ก ๐๐๐๐ ๐๐ ๐๐๐กโ๐๐๐๐ก๐๐๐ )/(๐๐๐ก๐๐ ๐ ๐ก๐ข๐๐๐๐ก๐ ) ร 100 28 = ๐/๐๐ร๐๐๐ 28 = ๐ฅ ร 4 28/4 = x 7 = x x = 7 โด 7 Students are not good in mathematics
