Answers

Add 40/12 and 54/70

1^st number: 3 4/12, 2^nd number: 54/70

40/12 + 54/70 is 431/105.

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,
   40/12 = 40 × 35/12 × 35 = 1400/420
3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
   54/70 = 54 × 6/70 × 6 = 324/420
4. Add the two like fractions:
   1400/420 + 324/420 = 1400 + 324/420 = 1724/420
5. 1724/420 simplified gives 431/105
6. So, 40/12 + 54/70 = 431/105
   In mixed form: 411/105

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