Answers

Subtract 4/81 from 56/80

56/80 - 4/81 is 527/810.

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,
   56/80 = 56 × 81/80 × 81 = 4536/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   4/81 = 4 × 80/81 × 80 = 320/6480
4. Subtract the two like fractions:
   4536/6480 - 320/6480 = 4536 - 320/6480 = 4216/6480
5. After reducing the fraction, the answer is 527/810

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