Answers

Subtract 81/40 from 84/30

1^st number: 2 24/30, 2^nd number: 2 1/40

84/30 - 81/40 is 31/40.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 30 × 4 = 120,
   84/30 = 84 × 4/30 × 4 = 336/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   81/40 = 81 × 3/40 × 3 = 243/120
4. Subtract the two like fractions:
   336/120 - 243/120 = 336 - 243/120 = 93/120
5. After reducing the fraction, the answer is 31/40

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