Subtract 3/63 from 20/5, Solve 4 0/5

Subtract 3/63 from 20/5

1^st number: 4 0/5, 2^nd number: 3/63

20/5 - 3/63 is 83/21.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 63 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 5 × 63 = 315,
20/5 = 20 × 63/5 × 63 = 1260/315
Likewise, for the 2nd fraction, since 63 × 5 = 315,
3/63 = 3 × 5/63 × 5 = 15/315
Subtract the two like fractions:
1260/315 - 15/315 = 1260 - 15/315 = 1245/315
After reducing the fraction, the answer is 83/21
In mixed form: 320/21

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