Answers

Subtract 40/84 from 81/30

1^st number: 2 21/30, 2^nd number: 40/84

81/30 - 40/84 is 467/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 30 × 14 = 420,
   81/30 = 81 × 14/30 × 14 = 1134/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   40/84 = 40 × 5/84 × 5 = 200/420
4. Subtract the two like fractions:
   1134/420 - 200/420 = 1134 - 200/420 = 934/420
5. After reducing the fraction, the answer is 467/210
6. In mixed form: 247/210

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