Answers

Add 80/63 and 40/90

1^st number: 1 17/63, 2^nd number: 40/90

80/63 + 40/90 is 12/7.

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,
   80/63 = 80 × 10/63 × 10 = 800/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   40/90 = 40 × 7/90 × 7 = 280/630
4. Add the two like fractions:
   800/630 + 280/630 = 800 + 280/630 = 1080/630
5. 1080/630 simplified gives 12/7
6. So, 80/63 + 40/90 = 12/7
   In mixed form: 15/7

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