Answers

Add 9/90 and 18/72

9/90 + 18/72 is 7/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 90 × 4 = 360,
   9/90 = 9 × 4/90 × 4 = 36/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   18/72 = 18 × 5/72 × 5 = 90/360
4. Add the two like fractions:
   36/360 + 90/360 = 36 + 90/360 = 126/360
5. 126/360 simplified gives 7/20
6. So, 9/90 + 18/72 = 7/20

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