Answers

Add 18/70 and 75/20

1^st number: 18/70, 2^nd number: 3 15/20

18/70 + 75/20 is 561/140.

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,
   18/70 = 18 × 2/70 × 2 = 36/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   75/20 = 75 × 7/20 × 7 = 525/140
4. Add the two like fractions:
   36/140 + 525/140 = 36 + 525/140 = 561/140
5. So, 18/70 + 75/20 = 561/140
   In mixed form: 41/140

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