Answers

Add 42/80 and 63/45

1^st number: 42/80, 2^nd number: 1 18/45

42/80 + 63/45 is 77/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 45 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   42/80 = 42 × 9/80 × 9 = 378/720
3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
   63/45 = 63 × 16/45 × 16 = 1008/720
4. Add the two like fractions:
   378/720 + 1008/720 = 378 + 1008/720 = 1386/720
5. 1386/720 simplified gives 77/40
6. So, 42/80 + 63/45 = 77/40
   In mixed form: 137/40

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