Subtract 90/63 from 7/10, Solve 7/10

Subtract 90/63 from 7/10

1^st number: 7/10, 2^nd number: 1 27/63

7/10 - 90/63 is -51/70.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 10 × 63 = 630,
7/10 = 7 × 63/10 × 63 = 441/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
90/63 = 90 × 10/63 × 10 = 900/630
Subtract the two like fractions:
441/630 - 900/630 = 441 - 900/630 = -459/630
After reducing the fraction, the answer is -51/70

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