Answers

Add 20/15 and 70/54

1^st number: 1 5/15, 2^nd number: 1 16/54

20/15 + 70/54 is 71/27.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 54 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 15 × 18 = 270,
   20/15 = 20 × 18/15 × 18 = 360/270
3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
   70/54 = 70 × 5/54 × 5 = 350/270
4. Add the two like fractions:
   360/270 + 350/270 = 360 + 350/270 = 710/270
5. 710/270 simplified gives 71/27
6. So, 20/15 + 70/54 = 71/27
   In mixed form: 217/27

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