Answers

Subtract 7/90 from 20/54

20/54 - 7/90 is 79/270.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 90 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 54 × 5 = 270,
   20/54 = 20 × 5/54 × 5 = 100/270
3. Likewise, for the 2nd fraction, since 90 × 3 = 270,
   7/90 = 7 × 3/90 × 3 = 21/270
4. Subtract the two like fractions:
   100/270 - 21/270 = 100 - 21/270 = 79/270

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