Answers

Add 10/70 and 75/20

1^st number: 10/70, 2^nd number: 3 15/20

10/70 + 75/20 is 109/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   10/70 = 10 × 2/70 × 2 = 20/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   75/20 = 75 × 7/20 × 7 = 525/140
4. Add the two like fractions:
   20/140 + 525/140 = 20 + 525/140 = 545/140
5. 545/140 simplified gives 109/28
6. So, 10/70 + 75/20 = 109/28
   In mixed form: 325/28

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