Subtract 30/28 from 70/20
1st number: 3 10/20, 2nd number: 1 2/28
70/20 - 30/28 is 17/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Subtract the two like fractions:
490/140 - 150/140 = 490 - 150/140 = 340/140 - After reducing the fraction, the answer is 17/7
- In mixed form: 23/7
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