- A0.17
- B0.85
- C0.35
- D1.7
Step-by-Step Solution
Rewrite with denominator 100 by taking 5 times both parts: . Copying the numerator straight after the point gives 0.17 and ignores the denominator altogether.
Answer: B) 0.85
In a class test Ishan scored of the total marks. Written as a decimal, what part of the total did he score?
Class 6DecimalsDecimals
Key idea: Decimal ↔ fraction
**Decimal to fraction**: count the decimal places. Put the digits over 10, 100, 1000 accordingly. So 0.7 = 7/10. 0.43 = 43/100. 1.25 = 1 + 25/100 = 1 + 1/4 = 5/4.
**Fraction to decimal**: if the denominator is already 10, 100, 1000, …, just write the numerator with the right number of decimal places. 9/10 = 0.9. 27/100 = 0.27. For other fractions (e.g. 3/4), divide: 3 ÷ 4 = 0.75.
**Fraction to decimal**: if the denominator is already 10, 100, 1000, …, just write the numerator with the right number of decimal places. 9/10 = 0.9. 27/100 = 0.27. For other fractions (e.g. 3/4), divide: 3 ÷ 4 = 0.75.
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