Answers

Add 42/72 and 63/40

1^st number: 42/72, 2^nd number: 1 23/40

42/72 + 63/40 is 259/120.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 40 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   42/72 = 42 × 5/72 × 5 = 210/360
3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
   63/40 = 63 × 9/40 × 9 = 567/360
4. Add the two like fractions:
   210/360 + 567/360 = 210 + 567/360 = 777/360
5. 777/360 simplified gives 259/120
6. So, 42/72 + 63/40 = 259/120
   In mixed form: 219/120

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