Answers

Add 81/45 and 70/40

1^st number: 1 36/45, 2^nd number: 1 30/40

81/45 + 70/40 is 71/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 45 × 8 = 360,
   81/45 = 81 × 8/45 × 8 = 648/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   70/40 = 70 × 9/40 × 9 = 630/360
4. Add the two like fractions:
   648/360 + 630/360 = 648 + 630/360 = 1278/360
5. 1278/360 simplified gives 71/20
6. So, 81/45 + 70/40 = 71/20
   In mixed form: 311/20

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