Answers

Add 42/81 and 75/40

1^st number: 42/81, 2^nd number: 1 35/40

42/81 + 75/40 is 517/216.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 40 is 3240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 3240
2. For the 1st fraction, since 81 × 40 = 3240,
   42/81 = 42 × 40/81 × 40 = 1680/3240
3. Likewise, for the 2nd fraction, since 40 × 81 = 3240,
   75/40 = 75 × 81/40 × 81 = 6075/3240
4. Add the two like fractions:
   1680/3240 + 6075/3240 = 1680 + 6075/3240 = 7755/3240
5. 7755/3240 simplified gives 517/216
6. So, 42/81 + 75/40 = 517/216
   In mixed form: 285/216

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