Answers

Add 70/42 and 45/80

1^st number: 1 28/42, 2^nd number: 45/80

70/42 + 45/80 is 107/48.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 42 × 40 = 1680,
   70/42 = 70 × 40/42 × 40 = 2800/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   45/80 = 45 × 21/80 × 21 = 945/1680
4. Add the two like fractions:
   2800/1680 + 945/1680 = 2800 + 945/1680 = 3745/1680
5. 3745/1680 simplified gives 107/48
6. So, 70/42 + 45/80 = 107/48
   In mixed form: 211/48

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