Subtract 27/32 from 20/30
20/30 - 27/32 is -17/96.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 32 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 30 × 16 = 480,
20/30 = 20 × 16/30 × 16 = 320/480 - Likewise, for the 2nd fraction, since 32 × 15 = 480,
27/32 = 27 × 15/32 × 15 = 405/480 - Subtract the two like fractions:
320/480 - 405/480 = 320 - 405/480 = -85/480 - After reducing the fraction, the answer is -17/96
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30-27/32 20/30-54/32 20/60-27/32 20/30-27/64 60/30-27/32 20/30-81/32 20/90-27/32 20/30-27/96