Answers

Add 40/90 and 81/70

1^st number: 40/90, 2^nd number: 1 11/70

40/90 + 81/70 is 1009/630.

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,
   40/90 = 40 × 7/90 × 7 = 280/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   81/70 = 81 × 9/70 × 9 = 729/630
4. Add the two like fractions:
   280/630 + 729/630 = 280 + 729/630 = 1009/630
5. So, 40/90 + 81/70 = 1009/630
   In mixed form: 1379/630

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