Answers

Add 45/12 and 40/70

1^st number: 3 9/12, 2^nd number: 40/70

45/12 + 40/70 is 121/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 70 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 12 × 35 = 420,
   45/12 = 45 × 35/12 × 35 = 1575/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   40/70 = 40 × 6/70 × 6 = 240/420
4. Add the two like fractions:
   1575/420 + 240/420 = 1575 + 240/420 = 1815/420
5. 1815/420 simplified gives 121/28
6. So, 45/12 + 40/70 = 121/28
   In mixed form: 49/28

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