Subtract 20/45 from 15/49
15/49 - 20/45 is -61/441.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 45 is 2205
Next, find the equivalent fraction of both fractional numbers with denominator 2205 - For the 1st fraction, since 49 × 45 = 2205,
15/49 = 15 × 45/49 × 45 = 675/2205 - Likewise, for the 2nd fraction, since 45 × 49 = 2205,
20/45 = 20 × 49/45 × 49 = 980/2205 - Subtract the two like fractions:
675/2205 - 980/2205 = 675 - 980/2205 = -305/2205 - After reducing the fraction, the answer is -61/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/49-20/45 15/49-40/45 15/98-20/45 15/49-20/90 45/49-20/45 15/49-60/45 75/49-20/45