Subtract 1/30 from 28/21
1st number: 1 7/21, 2nd number: 1/30
28/21 - 1/30 is 13/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
28/21 = 28 × 10/21 × 10 = 280/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Subtract the two like fractions:
280/210 - 7/210 = 280 - 7/210 = 273/210 - After reducing the fraction, the answer is 13/10
- In mixed form: 13/10
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