Answers

Add 80/72 and 18/90

1^st number: 1 8/72, 2^nd number: 18/90

80/72 + 18/90 is 59/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 90 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 90 × 4 = 360,
   18/90 = 18 × 4/90 × 4 = 72/360
4. Add the two like fractions:
   400/360 + 72/360 = 400 + 72/360 = 472/360
5. 472/360 simplified gives 59/45
6. So, 80/72 + 18/90 = 59/45
   In mixed form: 114/45

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