Answers

Add 90/30 and 21/20

1^st number: 3 0/30, 2^nd number: 1 1/20

90/30 + 21/20 is 81/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 20 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 30 × 2 = 60,
   90/30 = 90 × 2/30 × 2 = 180/60
3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
   21/20 = 21 × 3/20 × 3 = 63/60
4. Add the two like fractions:
   180/60 + 63/60 = 180 + 63/60 = 243/60
5. 243/60 simplified gives 81/20
6. So, 90/30 + 21/20 = 81/20
   In mixed form: 41/20

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