Answers

Subtract 15/81 from 49/80

49/80 - 15/81 is 923/2160.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   49/80 = 49 × 81/80 × 81 = 3969/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   15/81 = 15 × 80/81 × 80 = 1200/6480
4. Subtract the two like fractions:
   3969/6480 - 1200/6480 = 3969 - 1200/6480 = 2769/6480
5. After reducing the fraction, the answer is 923/2160

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