Answers

Add 1/90 and 80/63

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

1/90 + 80/63 is 269/210.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   1/90 = 1 × 7/90 × 7 = 7/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   80/63 = 80 × 10/63 × 10 = 800/630
4. Add the two like fractions:
   7/630 + 800/630 = 7 + 800/630 = 807/630
5. 807/630 simplified gives 269/210
6. So, 1/90 + 80/63 = 269/210
   In mixed form: 159/210

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