7/12 - 3/8 - 4/9 = _____?
- -19/72
- -11/72
- -17/72
- None of these
Explanation
To evaluate the expression 7/12 - 3/8 - 4/9:
Step 1: Find the least common multiple (LCM) of 12, 8, and 9.
The LCM of 12, 8, and 9 is 72.
Step 2: Convert each fraction to have a denominator of 72.
7/12 = (7 × 6) / (12 × 6) = 42/72
3/8 = (3 × 9) / (8 × 9) = 27/72
4/9 = (4 × 8) / (9 × 8) = 32/72
Step 3: Subtract the fractions.
42/72 - 27/72 - 32/72 = (42 - 27 - 32) / 72
= (42 - 59) / 72
= -17/72
Related MCQs
- 3/2
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- 1/4
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 120
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- 240
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
