Subtract 12/49 from 9/40
9/40 - 12/49 is -39/1960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
9/40 = 9 × 49/40 × 49 = 441/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
12/49 = 12 × 40/49 × 40 = 480/1960 - Subtract the two like fractions:
441/1960 - 480/1960 = 441 - 480/1960 = -39/1960
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-12/49 9/40-24/49 9/80-12/49 9/40-12/98 27/40-12/49 9/40-36/49 45/40-12/49 9/40-60/49 63/40-12/49 9/40-84/49