Subtract 90/63 from 25/30, Solve 25/30

Subtract 90/63 from 25/30

1^st number: 25/30, 2^nd number: 1 27/63

25/30 - 90/63 is -25/42.

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,
90/63 = 90 × 10/63 × 10 = 900/630
Subtract the two like fractions:
525/630 - 900/630 = 525 - 900/630 = -375/630
After reducing the fraction, the answer is -25/42

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