Subtract 20/32 from 3/30
3/30 - 20/32 is -21/40.
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,
3/30 = 3 × 16/30 × 16 = 48/480 - Likewise, for the 2nd fraction, since 32 × 15 = 480,
20/32 = 20 × 15/32 × 15 = 300/480 - Subtract the two like fractions:
48/480 - 300/480 = 48 - 300/480 = -252/480 - After reducing the fraction, the answer is -21/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/30-20/32 3/30-40/32 3/60-20/32 3/30-20/64 9/30-20/32 3/30-60/32 3/90-20/32 3/30-20/96 15/30-20/32 21/30-20/32