Subtract 42/81 from 28/32
28/32 - 42/81 is 77/216.
Steps for subtracting fractions
- 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 - For the 1st fraction, since 32 × 81 = 2592,
28/32 = 28 × 81/32 × 81 = 2268/2592 - Likewise, for the 2nd fraction, since 81 × 32 = 2592,
42/81 = 42 × 32/81 × 32 = 1344/2592 - Subtract the two like fractions:
2268/2592 - 1344/2592 = 2268 - 1344/2592 = 924/2592 - After reducing the fraction, the answer is 77/216
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