Answers

Add 80/72 and 42/45

1^st number: 1 8/72, 2^nd number: 42/45

80/72 + 42/45 is 92/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 45 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   80/72 = 80 × 5/72 × 5 = 400/360
3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
   42/45 = 42 × 8/45 × 8 = 336/360
4. Add the two like fractions:
   400/360 + 336/360 = 400 + 336/360 = 736/360
5. 736/360 simplified gives 92/45
6. So, 80/72 + 42/45 = 92/45
   In mixed form: 22/45

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