Answers

Subtract 90/54 from 24/21

1^st number: 1 3/21, 2^nd number: 1 36/54

24/21 - 90/54 is -11/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 54 is 378
   
   Next, find the equivalent fraction of both fractional numbers with denominator 378
2. For the 1st fraction, since 21 × 18 = 378,
   24/21 = 24 × 18/21 × 18 = 432/378
3. Likewise, for the 2nd fraction, since 54 × 7 = 378,
   90/54 = 90 × 7/54 × 7 = 630/378
4. Subtract the two like fractions:
   432/378 - 630/378 = 432 - 630/378 = -198/378
5. After reducing the fraction, the answer is -11/21

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