Subtract 40/24 from 90/21
1st number: 4 6/21, 2nd number: 1 16/24
90/21 - 40/24 is 55/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 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 24 × 7 = 168,
40/24 = 40 × 7/24 × 7 = 280/168 - Subtract the two like fractions:
720/168 - 280/168 = 720 - 280/168 = 440/168 - After reducing the fraction, the answer is 55/21
- In mixed form: 213/21
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