Subtract 10/40 from 30/70
30/70 - 10/40 is 5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
30/70 = 30 × 4/70 × 4 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
10/40 = 10 × 7/40 × 7 = 70/280 - Subtract the two like fractions:
120/280 - 70/280 = 120 - 70/280 = 50/280 - After reducing the fraction, the answer is 5/28
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