Answers

Add 42/40 and 54/72

1^st number: 1 2/40, 2^nd number: 54/72

42/40 + 54/72 is 9/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 72 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 72 × 5 = 360,
   54/72 = 54 × 5/72 × 5 = 270/360
4. Add the two like fractions:
   378/360 + 270/360 = 378 + 270/360 = 648/360
5. 648/360 simplified gives 9/5
6. So, 42/40 + 54/72 = 9/5
   In mixed form: 14/5

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