Answers

Add 90/20 and 70/42

1^st number: 4 10/20, 2^nd number: 1 28/42

90/20 + 70/42 is 37/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   90/20 = 90 × 21/20 × 21 = 1890/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   70/42 = 70 × 10/42 × 10 = 700/420
4. Add the two like fractions:
   1890/420 + 700/420 = 1890 + 700/420 = 2590/420
5. 2590/420 simplified gives 37/6
6. So, 90/20 + 70/42 = 37/6
   In mixed form: 61/6

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