Answers

Add 42/28 and 90/70

1^st number: 1 14/28, 2^nd number: 1 20/70

42/28 + 90/70 is 39/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 70 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   42/28 = 42 × 5/28 × 5 = 210/140
3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
   90/70 = 90 × 2/70 × 2 = 180/140
4. Add the two like fractions:
   210/140 + 180/140 = 210 + 180/140 = 390/140
5. 390/140 simplified gives 39/14
6. So, 42/28 + 90/70 = 39/14
   In mixed form: 211/14

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