Subtract 70/63 from 18/10, Solve 1 8/10

Subtract 70/63 from 18/10

1^st number: 1 8/10, 2^nd number: 1 7/63

18/10 - 70/63 is 31/45.

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,
18/10 = 18 × 63/10 × 63 = 1134/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
70/63 = 70 × 10/63 × 10 = 700/630
Subtract the two like fractions:
1134/630 - 700/630 = 1134 - 700/630 = 434/630
After reducing the fraction, the answer is 31/45

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