Subtract 21/63 from 25/30
25/30 - 21/63 is 1/2.
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,
25/30 = 25 × 21/30 × 21 = 525/630 - Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630 - Subtract the two like fractions:
525/630 - 210/630 = 525 - 210/630 = 315/630 - After reducing the fraction, the answer is 1/2
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