Subtract 27/32 from 15/42
15/42 - 27/32 is -109/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 42 × 16 = 672,
15/42 = 15 × 16/42 × 16 = 240/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
27/32 = 27 × 21/32 × 21 = 567/672 - Subtract the two like fractions:
240/672 - 567/672 = 240 - 567/672 = -327/672 - After reducing the fraction, the answer is -109/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42-27/32 15/42-54/32 15/84-27/32 15/42-27/64 45/42-27/32 15/42-81/32 15/42-27/96 75/42-27/32