Subtract 20/30 from 4/16
4/16 - 20/30 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
4/16 = 4 × 15/16 × 15 = 60/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
20/30 = 20 × 8/30 × 8 = 160/240 - Subtract the two like fractions:
60/240 - 160/240 = 60 - 160/240 = -100/240 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/16-20/30 4/16-40/30 4/32-20/30 4/16-20/60 12/16-20/30 4/16-60/30 4/48-20/30 4/16-20/90 20/16-20/30 4/80-20/30 28/16-20/30