Answers

Add 72/64 and 42/60

1^st number: 1 8/64, 2^nd number: 42/60

72/64 + 42/60 is 73/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 64 and 60 is 960
   
   Next, find the equivalent fraction of both fractional numbers with denominator 960
2. For the 1st fraction, since 64 × 15 = 960,
   72/64 = 72 × 15/64 × 15 = 1080/960
3. Likewise, for the 2nd fraction, since 60 × 16 = 960,
   42/60 = 42 × 16/60 × 16 = 672/960
4. Add the two like fractions:
   1080/960 + 672/960 = 1080 + 672/960 = 1752/960
5. 1752/960 simplified gives 73/40
6. So, 72/64 + 42/60 = 73/40
   In mixed form: 133/40

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