Answers

Subtract 40/7 from 81/4

1^st number: 20 1/4, 2^nd number: 5 5/7

81/4 - 40/7 is 407/28.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 7 is 28
   
   Next, find the equivalent fraction of both fractional numbers with denominator 28
2. For the 1st fraction, since 4 × 7 = 28,
   81/4 = 81 × 7/4 × 7 = 567/28
3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
   40/7 = 40 × 4/7 × 4 = 160/28
4. Subtract the two like fractions:
   567/28 - 160/28 = 567 - 160/28 = 407/28
5. In mixed form: 1415/28

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