Answers

Add 45/70 and 70/12

1^st number: 45/70, 2^nd number: 5 10/12

45/70 + 70/12 is 136/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 12 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 70 × 6 = 420,
   45/70 = 45 × 6/70 × 6 = 270/420
3. Likewise, for the 2nd fraction, since 12 × 35 = 420,
   70/12 = 70 × 35/12 × 35 = 2450/420
4. Add the two like fractions:
   270/420 + 2450/420 = 270 + 2450/420 = 2720/420
5. 2720/420 simplified gives 136/21
6. So, 45/70 + 70/12 = 136/21
   In mixed form: 610/21

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