Subtract 18/42 from 90/2
1st number: 45 0/2, 2nd number: 18/42
90/2 - 18/42 is 312/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
90/2 = 90 × 21/2 × 21 = 1890/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
18/42 = 18 × 1/42 × 1 = 18/42 - Subtract the two like fractions:
1890/42 - 18/42 = 1890 - 18/42 = 1872/42 - After reducing the fraction, the answer is 312/7
- In mixed form: 444/7
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