Subtract 98/40 from 8/42
1st number: 8/42, 2nd number: 2 18/40
8/42 - 98/40 is -949/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
8/42 = 8 × 20/42 × 20 = 160/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
98/40 = 98 × 21/40 × 21 = 2058/840 - Subtract the two like fractions:
160/840 - 2058/840 = 160 - 2058/840 = -1898/840 - After reducing the fraction, the answer is -949/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-98/40 8/84-98/40 8/42-98/80 24/42-98/40 40/42-98/40 56/42-98/40