Answers

Add 90/27 and 90/70

1^st number: 3 9/27, 2^nd number: 1 20/70

90/27 + 90/70 is 97/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 70 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 27 × 70 = 1890,
   90/27 = 90 × 70/27 × 70 = 6300/1890
3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
   90/70 = 90 × 27/70 × 27 = 2430/1890
4. Add the two like fractions:
   6300/1890 + 2430/1890 = 6300 + 2430/1890 = 8730/1890
5. 8730/1890 simplified gives 97/21
6. So, 90/27 + 90/70 = 97/21
   In mixed form: 413/21

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