Answers

Add 80/18 and 90/72

1^st number: 4 8/18, 2^nd number: 1 18/72

80/18 + 90/72 is 205/36.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 72 is 72
   
   Next, find the equivalent fraction of both fractional numbers with denominator 72
2. For the 1st fraction, since 18 × 4 = 72,
   80/18 = 80 × 4/18 × 4 = 320/72
3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
   90/72 = 90 × 1/72 × 1 = 90/72
4. Add the two like fractions:
   320/72 + 90/72 = 320 + 90/72 = 410/72
5. 410/72 simplified gives 205/36
6. So, 80/18 + 90/72 = 205/36
   In mixed form: 525/36

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