Subtract 48/81 from 21/32
21/32 - 48/81 is 55/864.
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,
21/32 = 21 × 81/32 × 81 = 1701/2592 - Likewise, for the 2nd fraction, since 81 × 32 = 2592,
48/81 = 48 × 32/81 × 32 = 1536/2592 - Subtract the two like fractions:
1701/2592 - 1536/2592 = 1701 - 1536/2592 = 165/2592 - After reducing the fraction, the answer is 55/864
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/32-48/81 21/32-96/81 21/64-48/81 63/32-48/81 21/96-48/81