Subtract 15/21 from 70/15
1st number: 4 10/15, 2nd number: 15/21
70/15 - 15/21 is 83/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
70/15 = 70 × 7/15 × 7 = 490/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Subtract the two like fractions:
490/105 - 75/105 = 490 - 75/105 = 415/105 - After reducing the fraction, the answer is 83/21
- In mixed form: 320/21
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