Subtract 9/10 from 7/42
7/42 - 9/10 is -11/15.
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,
7/42 = 7 × 5/42 × 5 = 35/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
9/10 = 9 × 21/10 × 21 = 189/210 - Subtract the two like fractions:
35/210 - 189/210 = 35 - 189/210 = -154/210 - After reducing the fraction, the answer is -11/15
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