Subtract 30/56 from 90/21
1st number: 4 6/21, 2nd number: 30/56
90/21 - 30/56 is 15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
90/21 = 90 × 8/21 × 8 = 720/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
30/56 = 30 × 3/56 × 3 = 90/168 - Subtract the two like fractions:
720/168 - 90/168 = 720 - 90/168 = 630/168 - After reducing the fraction, the answer is 15/4
- In mixed form: 33/4
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