Answers

Add 81/40 and 45/70

1^st number: 2 1/40, 2^nd number: 45/70

81/40 + 45/70 is 747/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 70 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 40 × 7 = 280,
   81/40 = 81 × 7/40 × 7 = 567/280
3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
   45/70 = 45 × 4/70 × 4 = 180/280
4. Add the two like fractions:
   567/280 + 180/280 = 567 + 180/280 = 747/280
5. So, 81/40 + 45/70 = 747/280
   In mixed form: 2187/280

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