Subtract 8/16 from 20/49
20/49 - 8/16 is -9/98.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 16 is 784
Next, find the equivalent fraction of both fractional numbers with denominator 784 - For the 1st fraction, since 49 × 16 = 784,
20/49 = 20 × 16/49 × 16 = 320/784 - Likewise, for the 2nd fraction, since 16 × 49 = 784,
8/16 = 8 × 49/16 × 49 = 392/784 - Subtract the two like fractions:
320/784 - 392/784 = 320 - 392/784 = -72/784 - After reducing the fraction, the answer is -9/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49-8/16 20/98-8/16 20/49-8/32 60/49-8/16 20/49-24/16 20/49-8/48 20/49-40/16 20/49-8/80 20/49-56/16