Answers

Subtract 7/18 from 81/40

1^st number: 2 1/40, 2^nd number: 7/18

81/40 - 7/18 is 589/360.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 18 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   81/40 = 81 × 9/40 × 9 = 729/360
3. Likewise, for the 2nd fraction, since 18 × 20 = 360,
   7/18 = 7 × 20/18 × 20 = 140/360
4. Subtract the two like fractions:
   729/360 - 140/360 = 729 - 140/360 = 589/360
5. In mixed form: 1229/360

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