Subtract 4/5 from 70/21
1st number: 3 7/21, 2nd number: 4/5
70/21 - 4/5 is 38/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
70/21 = 70 × 5/21 × 5 = 350/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
4/5 = 4 × 21/5 × 21 = 84/105 - Subtract the two like fractions:
350/105 - 84/105 = 350 - 84/105 = 266/105 - After reducing the fraction, the answer is 38/15
- In mixed form: 28/15
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