Subtract 7/10 from 5/42
5/42 - 7/10 is -61/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
5/42 = 5 × 5/42 × 5 = 25/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
7/10 = 7 × 21/10 × 21 = 147/210 - Subtract the two like fractions:
25/210 - 147/210 = 25 - 147/210 = -122/210 - After reducing the fraction, the answer is -61/105
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