Subtract 42/70 from 70/20
1st number: 3 10/20, 2nd number: 42/70
70/20 - 42/70 is 29/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 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 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Subtract the two like fractions:
490/140 - 84/140 = 490 - 84/140 = 406/140 - After reducing the fraction, the answer is 29/10
- In mixed form: 29/10
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