Subtract 12/63 from 21/30
21/30 - 12/63 is 107/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 30 × 21 = 630,
21/30 = 21 × 21/30 × 21 = 441/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
12/63 = 12 × 10/63 × 10 = 120/630 - Subtract the two like fractions:
441/630 - 120/630 = 441 - 120/630 = 321/630 - After reducing the fraction, the answer is 107/210
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