Answers

Subtract 81/14 from 90/40

1^st number: 2 10/40, 2^nd number: 5 11/14

90/40 - 81/14 is -99/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 14 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   90/40 = 90 × 7/40 × 7 = 630/280
3. Likewise, for the 2nd fraction, since 14 × 20 = 280,
   81/14 = 81 × 20/14 × 20 = 1620/280
4. Subtract the two like fractions:
   630/280 - 1620/280 = 630 - 1620/280 = -990/280
5. After reducing the fraction, the answer is -99/28

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