Answers

Subtract 20/63 from 90/27

1^st number: 3 9/27, 2^nd number: 20/63

90/27 - 20/63 is 190/63.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 63 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 27 × 7 = 189,
   90/27 = 90 × 7/27 × 7 = 630/189
3. Likewise, for the 2nd fraction, since 63 × 3 = 189,
   20/63 = 20 × 3/63 × 3 = 60/189
4. Subtract the two like fractions:
   630/189 - 60/189 = 630 - 60/189 = 570/189
5. After reducing the fraction, the answer is 190/63
6. In mixed form: 31/63

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