Answers

Add 42/63 and 27/90

42/63 + 27/90 is 29/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   42/63 = 42 × 10/63 × 10 = 420/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   27/90 = 27 × 7/90 × 7 = 189/630
4. Add the two like fractions:
   420/630 + 189/630 = 420 + 189/630 = 609/630
5. 609/630 simplified gives 29/30
6. So, 42/63 + 27/90 = 29/30

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