Subtract 28/7 from 42/70
1st number: 42/70, 2nd number: 4 0/7
42/70 - 28/7 is -17/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
28/7 = 28 × 10/7 × 10 = 280/70 - Subtract the two like fractions:
42/70 - 280/70 = 42 - 280/70 = -238/70 - After reducing the fraction, the answer is -17/5
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