Answers

Add 42/40 and 54/9

1^st number: 1 2/40, 2^nd number: 6 0/9

42/40 + 54/9 is 141/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 9 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   42/40 = 42 × 9/40 × 9 = 378/360
3. Likewise, for the 2nd fraction, since 9 × 40 = 360,
   54/9 = 54 × 40/9 × 40 = 2160/360
4. Add the two like fractions:
   378/360 + 2160/360 = 378 + 2160/360 = 2538/360
5. 2538/360 simplified gives 141/20
6. So, 42/40 + 54/9 = 141/20
   In mixed form: 71/20

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