Subtract 4/10 from 64/63, Solve 1 1/63

Subtract 4/10 from 64/63

1^st number: 1 1/63, 2^nd number: 4/10

64/63 - 4/10 is 194/315.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
64/63 = 64 × 10/63 × 10 = 640/630
Likewise, for the 2nd fraction, since 10 × 63 = 630,
4/10 = 4 × 63/10 × 63 = 252/630
Subtract the two like fractions:
640/630 - 252/630 = 640 - 252/630 = 388/630
After reducing the fraction, the answer is 194/315

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