Answers

Subtract 18/54 from 90/63

1^st number: 1 27/63, 2^nd number: 18/54

90/63 - 18/54 is 23/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 63 × 6 = 378,
   90/63 = 90 × 6/63 × 6 = 540/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   18/54 = 18 × 7/54 × 7 = 126/378
4. Subtract the two like fractions:
   540/378 - 126/378 = 540 - 126/378 = 414/378
5. After reducing the fraction, the answer is 23/21
6. In mixed form: 12/21

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