Answers

Add 90/42 and 20/90

1^st number: 2 6/42, 2^nd number: 20/90

90/42 + 20/90 is 149/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   90/42 = 90 × 15/42 × 15 = 1350/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   20/90 = 20 × 7/90 × 7 = 140/630
4. Add the two like fractions:
   1350/630 + 140/630 = 1350 + 140/630 = 1490/630
5. 1490/630 simplified gives 149/63
6. So, 90/42 + 20/90 = 149/63
   In mixed form: 223/63

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