Answers

Add 90/75 and 81/40

1^st number: 1 15/75, 2^nd number: 2 1/40

90/75 + 81/40 is 129/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 40 is 600
   
   Next, find the equivalent fraction of both fractional numbers with denominator 600
2. For the 1st fraction, since 75 × 8 = 600,
   90/75 = 90 × 8/75 × 8 = 720/600
3. Likewise, for the 2nd fraction, since 40 × 15 = 600,
   81/40 = 81 × 15/40 × 15 = 1215/600
4. Add the two like fractions:
   720/600 + 1215/600 = 720 + 1215/600 = 1935/600
5. 1935/600 simplified gives 129/40
6. So, 90/75 + 81/40 = 129/40
   In mixed form: 39/40

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