Answers

Add 90/54 and 21/70

1^st number: 1 36/54, 2^nd number: 21/70

90/54 + 21/70 is 59/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 70 is 1890
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1890
2. For the 1st fraction, since 54 × 35 = 1890,
   90/54 = 90 × 35/54 × 35 = 3150/1890
3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
   21/70 = 21 × 27/70 × 27 = 567/1890
4. Add the two like fractions:
   3150/1890 + 567/1890 = 3150 + 567/1890 = 3717/1890
5. 3717/1890 simplified gives 59/30
6. So, 90/54 + 21/70 = 59/30
   In mixed form: 129/30

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