Answers

Subtract 20/80 from 21/15

1^st number: 1 6/15, 2^nd number: 20/80

21/15 - 20/80 is 23/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 15 × 16 = 240,
   21/15 = 21 × 16/15 × 16 = 336/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   20/80 = 20 × 3/80 × 3 = 60/240
4. Subtract the two like fractions:
   336/240 - 60/240 = 336 - 60/240 = 276/240
5. After reducing the fraction, the answer is 23/20
6. In mixed form: 13/20

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