Answers

Add 81/63 and 42/72

1^st number: 1 18/63, 2^nd number: 42/72

81/63 + 42/72 is 157/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 63 × 8 = 504,
   81/63 = 81 × 8/63 × 8 = 648/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   42/72 = 42 × 7/72 × 7 = 294/504
4. Add the two like fractions:
   648/504 + 294/504 = 648 + 294/504 = 942/504
5. 942/504 simplified gives 157/84
6. So, 81/63 + 42/72 = 157/84
   In mixed form: 173/84

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