Answers

Add 7/90 and 81/70

1^st number: 7/90, 2^nd number: 1 11/70

7/90 + 81/70 is 389/315.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   7/90 = 7 × 7/90 × 7 = 49/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   81/70 = 81 × 9/70 × 9 = 729/630
4. Add the two like fractions:
   49/630 + 729/630 = 49 + 729/630 = 778/630
5. 778/630 simplified gives 389/315
6. So, 7/90 + 81/70 = 389/315
   In mixed form: 174/315

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