Answers

Add 40/90 and 80/70

1^st number: 40/90, 2^nd number: 1 10/70

40/90 + 80/70 is 100/63.

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,
   80/70 = 80 × 9/70 × 9 = 720/630
4. Add the two like fractions:
   280/630 + 720/630 = 280 + 720/630 = 1000/630
5. 1000/630 simplified gives 100/63
6. So, 40/90 + 80/70 = 100/63
   In mixed form: 137/63

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