Subtract 21/70 from 28/15
1st number: 1 13/15, 2nd number: 21/70
28/15 - 21/70 is 47/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
28/15 = 28 × 14/15 × 14 = 392/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
21/70 = 21 × 3/70 × 3 = 63/210 - Subtract the two like fractions:
392/210 - 63/210 = 392 - 63/210 = 329/210 - After reducing the fraction, the answer is 47/30
- In mixed form: 117/30
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