Answers

Subtract 45/14 from 90/20

1^st number: 4 10/20, 2^nd number: 3 3/14

90/20 - 45/14 is 9/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 14 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   90/20 = 90 × 7/20 × 7 = 630/140
3. Likewise, for the 2nd fraction, since 14 × 10 = 140,
   45/14 = 45 × 10/14 × 10 = 450/140
4. Subtract the two like fractions:
   630/140 - 450/140 = 630 - 450/140 = 180/140
5. After reducing the fraction, the answer is 9/7
6. In mixed form: 12/7

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