Answers

Add 90/20 and 15/48

1^st number: 4 10/20, 2^nd number: 15/48

90/20 + 15/48 is 77/16.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 48 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 20 × 12 = 240,
   90/20 = 90 × 12/20 × 12 = 1080/240
3. Likewise, for the 2nd fraction, since 48 × 5 = 240,
   15/48 = 15 × 5/48 × 5 = 75/240
4. Add the two like fractions:
   1080/240 + 75/240 = 1080 + 75/240 = 1155/240
5. 1155/240 simplified gives 77/16
6. So, 90/20 + 15/48 = 77/16
   In mixed form: 413/16

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