Subtract 90/35 from 3/21
1st number: 3/21, 2nd number: 2 20/35
3/21 - 90/35 is -17/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
3/21 = 3 × 5/21 × 5 = 15/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
90/35 = 90 × 3/35 × 3 = 270/105 - Subtract the two like fractions:
15/105 - 270/105 = 15 - 270/105 = -255/105 - After reducing the fraction, the answer is -17/7
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