Answers

Subtract 3/40 from 81/7

1^st number: 11 4/7, 2^nd number: 3/40

81/7 - 3/40 is 3219/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 7 × 40 = 280,
   81/7 = 81 × 40/7 × 40 = 3240/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   3/40 = 3 × 7/40 × 7 = 21/280
4. Subtract the two like fractions:
   3240/280 - 21/280 = 3240 - 21/280 = 3219/280
5. In mixed form: 11139/280

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