Answers

Subtract 20/90 from 84/28

1^st number: 3 0/28, 2^nd number: 20/90

84/28 - 20/90 is 25/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   84/28 = 84 × 45/28 × 45 = 3780/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   20/90 = 20 × 14/90 × 14 = 280/1260
4. Subtract the two like fractions:
   3780/1260 - 280/1260 = 3780 - 280/1260 = 3500/1260
5. After reducing the fraction, the answer is 25/9
6. In mixed form: 27/9

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