Answers

Add 42/70 and 35/20

1^st number: 42/70, 2^nd number: 1 15/20

42/70 + 35/20 is 47/20.

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,
   42/70 = 42 × 2/70 × 2 = 84/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   35/20 = 35 × 7/20 × 7 = 245/140
4. Add the two like fractions:
   84/140 + 245/140 = 84 + 245/140 = 329/140
5. 329/140 simplified gives 47/20
6. So, 42/70 + 35/20 = 47/20
   In mixed form: 27/20

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