Answers

Add 90/54 and 42/60

1^st number: 1 36/54, 2^nd number: 42/60

90/54 + 42/60 is 71/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 60 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 54 × 10 = 540,
   90/54 = 90 × 10/54 × 10 = 900/540
3. Likewise, for the 2nd fraction, since 60 × 9 = 540,
   42/60 = 42 × 9/60 × 9 = 378/540
4. Add the two like fractions:
   900/540 + 378/540 = 900 + 378/540 = 1278/540
5. 1278/540 simplified gives 71/30
6. So, 90/54 + 42/60 = 71/30
   In mixed form: 211/30

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