Subtract 8/42 from 21/15
1st number: 1 6/15, 2nd number: 8/42
21/15 - 8/42 is 127/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
21/15 = 21 × 14/15 × 14 = 294/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Subtract the two like fractions:
294/210 - 40/210 = 294 - 40/210 = 254/210 - After reducing the fraction, the answer is 127/105
- In mixed form: 122/105
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