Answers

Add 81/63 and 6/90

1^st number: 1 18/63, 2^nd number: 6/90

81/63 + 6/90 is 142/105.

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,
   81/63 = 81 × 10/63 × 10 = 810/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   6/90 = 6 × 7/90 × 7 = 42/630
4. Add the two like fractions:
   810/630 + 42/630 = 810 + 42/630 = 852/630
5. 852/630 simplified gives 142/105
6. So, 81/63 + 6/90 = 142/105
   In mixed form: 137/105

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