Answers

Subtract 81/40 from 4/15

1^st number: 4/15, 2^nd number: 2 1/40

4/15 - 81/40 is -211/120.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 15 × 8 = 120,
   4/15 = 4 × 8/15 × 8 = 32/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   81/40 = 81 × 3/40 × 3 = 243/120
4. Subtract the two like fractions:
   32/120 - 243/120 = 32 - 243/120 = -211/120

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