Answers

Add 90/16 and 81/60

1^st number: 5 10/16, 2^nd number: 1 21/60

90/16 + 81/60 is 279/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 16 and 60 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 16 × 15 = 240,
   90/16 = 90 × 15/16 × 15 = 1350/240
3. Likewise, for the 2nd fraction, since 60 × 4 = 240,
   81/60 = 81 × 4/60 × 4 = 324/240
4. Add the two like fractions:
   1350/240 + 324/240 = 1350 + 324/240 = 1674/240
5. 1674/240 simplified gives 279/40
6. So, 90/16 + 81/60 = 279/40
   In mixed form: 639/40

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