Subtract 20/28 from 90/5
1st number: 18 0/5, 2nd number: 20/28
90/5 - 20/28 is 121/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
90/5 = 90 × 28/5 × 28 = 2520/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
20/28 = 20 × 5/28 × 5 = 100/140 - Subtract the two like fractions:
2520/140 - 100/140 = 2520 - 100/140 = 2420/140 - After reducing the fraction, the answer is 121/7
- In mixed form: 172/7
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