Answers

Subtract 18/98 from 40/20

1^st number: 2 0/20, 2^nd number: 18/98

40/20 - 18/98 is 89/49.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 98 is 980
   
   Next, find the equivalent fraction of both fractional numbers with denominator 980
2. For the 1st fraction, since 20 × 49 = 980,
   40/20 = 40 × 49/20 × 49 = 1960/980
3. Likewise, for the 2nd fraction, since 98 × 10 = 980,
   18/98 = 18 × 10/98 × 10 = 180/980
4. Subtract the two like fractions:
   1960/980 - 180/980 = 1960 - 180/980 = 1780/980
5. After reducing the fraction, the answer is 89/49
6. In mixed form: 140/49

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