Subtract 27/70 from 30/42
30/42 - 27/70 is 23/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
30/42 = 30 × 5/42 × 5 = 150/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
27/70 = 27 × 3/70 × 3 = 81/210 - Subtract the two like fractions:
150/210 - 81/210 = 150 - 81/210 = 69/210 - After reducing the fraction, the answer is 23/70
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