Answers

Subtract 20/50 from 21/28

21/28 - 20/50 is 7/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 50 is 700
   
   Next, find the equivalent fraction of both fractional numbers with denominator 700
2. For the 1st fraction, since 28 × 25 = 700,
   21/28 = 21 × 25/28 × 25 = 525/700
3. Likewise, for the 2nd fraction, since 50 × 14 = 700,
   20/50 = 20 × 14/50 × 14 = 280/700
4. Subtract the two like fractions:
   525/700 - 280/700 = 525 - 280/700 = 245/700
5. After reducing the fraction, the answer is 7/20

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