Answers

Subtract 21/80 from 8/28

8/28 - 21/80 is 13/560.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   8/28 = 8 × 20/28 × 20 = 160/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   21/80 = 21 × 7/80 × 7 = 147/560
4. Subtract the two like fractions:
   160/560 - 147/560 = 160 - 147/560 = 13/560

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