Answers

Subtract 30/90 from 21/49

21/49 - 30/90 is 2/21.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 90 is 4410
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4410
2. For the 1st fraction, since 49 × 90 = 4410,
   21/49 = 21 × 90/49 × 90 = 1890/4410
3. Likewise, for the 2nd fraction, since 90 × 49 = 4410,
   30/90 = 30 × 49/90 × 49 = 1470/4410
4. Subtract the two like fractions:
   1890/4410 - 1470/4410 = 1890 - 1470/4410 = 420/4410
5. After reducing the fraction, the answer is 2/21

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