Answers

Add 81/4 and 70/45

1^st number: 20 1/4, 2^nd number: 1 25/45

81/4 + 70/45 is 785/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 4 × 45 = 180,
   81/4 = 81 × 45/4 × 45 = 3645/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   70/45 = 70 × 4/45 × 4 = 280/180
4. Add the two like fractions:
   3645/180 + 280/180 = 3645 + 280/180 = 3925/180
5. 3925/180 simplified gives 785/36
6. So, 81/4 + 70/45 = 785/36
   In mixed form: 2129/36

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