Subtract 27/30 from 63/21
1st number: 3 0/21, 2nd number: 27/30
63/21 - 27/30 is 21/10.
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,
63/21 = 63 × 10/21 × 10 = 630/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Subtract the two like fractions:
630/210 - 189/210 = 630 - 189/210 = 441/210 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
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