Subtract 40/42 from 30/9
1st number: 3 3/9, 2nd number: 40/42
30/9 - 40/42 is 50/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
30/9 = 30 × 14/9 × 14 = 420/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
40/42 = 40 × 3/42 × 3 = 120/126 - Subtract the two like fractions:
420/126 - 120/126 = 420 - 120/126 = 300/126 - After reducing the fraction, the answer is 50/21
- In mixed form: 28/21
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