Subtract 98/8 from 42/5
1st number: 8 2/5, 2nd number: 12 2/8
42/5 - 98/8 is -77/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
42/5 = 42 × 8/5 × 8 = 336/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
98/8 = 98 × 5/8 × 5 = 490/40 - Subtract the two like fractions:
336/40 - 490/40 = 336 - 490/40 = -154/40 - After reducing the fraction, the answer is -77/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5-98/8 42/10-98/8 42/5-98/16 42/15-98/8 42/5-98/24 42/25-98/8 42/5-98/40 42/35-98/8 42/5-98/56