Answers

Add 15/70 and 90/12

1^st number: 15/70, 2^nd number: 7 6/12

15/70 + 90/12 is 54/7.

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,
   15/70 = 15 × 6/70 × 6 = 90/420
3. Likewise, for the 2nd fraction, since 12 × 35 = 420,
   90/12 = 90 × 35/12 × 35 = 3150/420
4. Add the two like fractions:
   90/420 + 3150/420 = 90 + 3150/420 = 3240/420
5. 3240/420 simplified gives 54/7
6. So, 15/70 + 90/12 = 54/7
   In mixed form: 75/7

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