Answers

Add 90/42 and 75/45

1^st number: 2 6/42, 2^nd number: 1 30/45

90/42 + 75/45 is 80/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 45 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 45 × 14 = 630,
   75/45 = 75 × 14/45 × 14 = 1050/630
4. Add the two like fractions:
   1350/630 + 1050/630 = 1350 + 1050/630 = 2400/630
5. 2400/630 simplified gives 80/21
6. So, 90/42 + 75/45 = 80/21
   In mixed form: 317/21

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