Answers

Add 72/64 and 42/80

1^st number: 1 8/64, 2^nd number: 42/80

72/64 + 42/80 is 33/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 80 is 320
   
   Next, find the equivalent fraction of both fractional numbers with denominator 320
2. For the 1st fraction, since 64 × 5 = 320,
   72/64 = 72 × 5/64 × 5 = 360/320
3. Likewise, for the 2nd fraction, since 80 × 4 = 320,
   42/80 = 42 × 4/80 × 4 = 168/320
4. Add the two like fractions:
   360/320 + 168/320 = 360 + 168/320 = 528/320
5. 528/320 simplified gives 33/20
6. So, 72/64 + 42/80 = 33/20
   In mixed form: 113/20

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