Answers

Add 90/42 and 42/20

1^st number: 2 6/42, 2^nd number: 2 2/20

90/42 + 42/20 is 297/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   90/42 = 90 × 10/42 × 10 = 900/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   42/20 = 42 × 21/20 × 21 = 882/420
4. Add the two like fractions:
   900/420 + 882/420 = 900 + 882/420 = 1782/420
5. 1782/420 simplified gives 297/70
6. So, 90/42 + 42/20 = 297/70
   In mixed form: 417/70

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