Subtract 40/98 from 21/40
21/40 - 40/98 is 229/1960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 98 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
21/40 = 21 × 49/40 × 49 = 1029/1960 - Likewise, for the 2nd fraction, since 98 × 20 = 1960,
40/98 = 40 × 20/98 × 20 = 800/1960 - Subtract the two like fractions:
1029/1960 - 800/1960 = 1029 - 800/1960 = 229/1960
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/40-40/98 21/40-80/98 21/80-40/98 63/40-40/98