Subtract 98/20 from 42/80
1st number: 42/80, 2nd number: 4 18/20
42/80 - 98/20 is -35/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
42/80 = 42 × 1/80 × 1 = 42/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
98/20 = 98 × 4/20 × 4 = 392/80 - Subtract the two like fractions:
42/80 - 392/80 = 42 - 392/80 = -350/80 - After reducing the fraction, the answer is -35/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/80-98/20 42/80-98/40 42/80-98/60