Subtract 42/21 from 50/35
1st number: 1 15/35, 2nd number: 2 0/21
50/35 - 42/21 is -4/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 35 × 3 = 105,
50/35 = 50 × 3/35 × 3 = 150/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Subtract the two like fractions:
150/105 - 210/105 = 150 - 210/105 = -60/105 - After reducing the fraction, the answer is -4/7
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