Answers

Add 20/90 and 56/15

1^st number: 20/90, 2^nd number: 3 11/15

20/90 + 56/15 is 178/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 15 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   20/90 = 20 × 1/90 × 1 = 20/90
3. Likewise, for the 2nd fraction, since 15 × 6 = 90,
   56/15 = 56 × 6/15 × 6 = 336/90
4. Add the two like fractions:
   20/90 + 336/90 = 20 + 336/90 = 356/90
5. 356/90 simplified gives 178/45
6. So, 20/90 + 56/15 = 178/45
   In mixed form: 343/45

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