Answers

Add 42/20 and 70/90

1^st number: 2 2/20, 2^nd number: 70/90

42/20 + 70/90 is 259/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   42/20 = 42 × 9/20 × 9 = 378/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   70/90 = 70 × 2/90 × 2 = 140/180
4. Add the two like fractions:
   378/180 + 140/180 = 378 + 140/180 = 518/180
5. 518/180 simplified gives 259/90
6. So, 42/20 + 70/90 = 259/90
   In mixed form: 279/90

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