Answers

Subtract 40/49 from 40/90

40/90 - 40/49 is -164/441.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 49 is 4410
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4410
2. For the 1st fraction, since 90 × 49 = 4410,
   40/90 = 40 × 49/90 × 49 = 1960/4410
3. Likewise, for the 2nd fraction, since 49 × 90 = 4410,
   40/49 = 40 × 90/49 × 90 = 3600/4410
4. Subtract the two like fractions:
   1960/4410 - 3600/4410 = 1960 - 3600/4410 = -1640/4410
5. After reducing the fraction, the answer is -164/441

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