Answers

Add 54/42 and 20/45

1^st number: 1 12/42, 2^nd number: 20/45

54/42 + 20/45 is 109/63.

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,
   54/42 = 54 × 15/42 × 15 = 810/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   20/45 = 20 × 14/45 × 14 = 280/630
4. Add the two like fractions:
   810/630 + 280/630 = 810 + 280/630 = 1090/630
5. 1090/630 simplified gives 109/63
6. So, 54/42 + 20/45 = 109/63
   In mixed form: 146/63

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