Answers

Add 18/54 and 90/70

1^st number: 18/54, 2^nd number: 1 20/70

18/54 + 90/70 is 34/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 70 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 54 × 35 = 1890,
   18/54 = 18 × 35/54 × 35 = 630/1890
3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
   90/70 = 90 × 27/70 × 27 = 2430/1890
4. Add the two like fractions:
   630/1890 + 2430/1890 = 630 + 2430/1890 = 3060/1890
5. 3060/1890 simplified gives 34/21
6. So, 18/54 + 90/70 = 34/21
   In mixed form: 113/21

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