Subtract 42/40 from 4/98
1st number: 4/98, 2nd number: 1 2/40
4/98 - 42/40 is -989/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 98 × 20 = 1960,
4/98 = 4 × 20/98 × 20 = 80/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
42/40 = 42 × 49/40 × 49 = 2058/1960 - Subtract the two like fractions:
80/1960 - 2058/1960 = 80 - 2058/1960 = -1978/1960 - After reducing the fraction, the answer is -989/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/98-42/40 4/98-84/40 4/98-42/80 12/98-42/40 20/98-42/40 28/98-42/40