Subtract 6/63 from 90/80, Solve 1 10/80

Subtract 6/63 from 90/80

1^st number: 1 10/80, 2^nd number: 6/63

90/80 - 6/63 is 173/168.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040

Next, find the equivalent fraction of both fractional numbers with denominator 5040
For the 1st fraction, since 80 × 63 = 5040,
90/80 = 90 × 63/80 × 63 = 5670/5040
Likewise, for the 2nd fraction, since 63 × 80 = 5040,
6/63 = 6 × 80/63 × 80 = 480/5040
Subtract the two like fractions:
5670/5040 - 480/5040 = 5670 - 480/5040 = 5190/5040
After reducing the fraction, the answer is 173/168
In mixed form: 15/168

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