Answers

Subtract 7/45 from 9/20

9/20 - 7/45 is 53/180.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   9/20 = 9 × 9/20 × 9 = 81/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   7/45 = 7 × 4/45 × 4 = 28/180
4. Subtract the two like fractions:
   81/180 - 28/180 = 81 - 28/180 = 53/180

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