Subtract 20/5 from 98/81
1st number: 1 17/81, 2nd number: 4 0/5
98/81 - 20/5 is -226/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 5 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
98/81 = 98 × 5/81 × 5 = 490/405 - Likewise, for the 2nd fraction, since 5 × 81 = 405,
20/5 = 20 × 81/5 × 81 = 1620/405 - Subtract the two like fractions:
490/405 - 1620/405 = 490 - 1620/405 = -1130/405 - After reducing the fraction, the answer is -226/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/81-40/5 98/81-20/10 98/81-60/5 98/81-20/15 98/81-20/25 98/81-20/35