Subtract 21/32 from 42/54
42/54 - 21/32 is 35/288.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 32 is 864
Next, find the equivalent fraction of both fractional numbers with denominator 864 - For the 1st fraction, since 54 × 16 = 864,
42/54 = 42 × 16/54 × 16 = 672/864 - Likewise, for the 2nd fraction, since 32 × 27 = 864,
21/32 = 21 × 27/32 × 27 = 567/864 - Subtract the two like fractions:
672/864 - 567/864 = 672 - 567/864 = 105/864 - After reducing the fraction, the answer is 35/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54-21/32 42/54-42/32 42/54-21/64 42/54-63/32 42/54-21/96