Answers

Subtract 4/81 from 28/32

28/32 - 4/81 is 535/648.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 32 and 81 is 2592
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2592
2. For the 1st fraction, since 32 × 81 = 2592,
   28/32 = 28 × 81/32 × 81 = 2268/2592
3. Likewise, for the 2nd fraction, since 81 × 32 = 2592,
   4/81 = 4 × 32/81 × 32 = 128/2592
4. Subtract the two like fractions:
   2268/2592 - 128/2592 = 2268 - 128/2592 = 2140/2592
5. After reducing the fraction, the answer is 535/648

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