Answers

Subtract 15/21 from 54/40

1^st number: 1 14/40, 2^nd number: 15/21

54/40 - 15/21 is 89/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 21 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 40 × 21 = 840,
   54/40 = 54 × 21/40 × 21 = 1134/840
3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
   15/21 = 15 × 40/21 × 40 = 600/840
4. Subtract the two like fractions:
   1134/840 - 600/840 = 1134 - 600/840 = 534/840
5. After reducing the fraction, the answer is 89/140

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