Subtract 98/20 from 20/90
1st number: 20/90, 2nd number: 4 18/20
20/90 - 98/20 is -421/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
20/90 = 20 × 2/90 × 2 = 40/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
98/20 = 98 × 9/20 × 9 = 882/180 - Subtract the two like fractions:
40/180 - 882/180 = 40 - 882/180 = -842/180 - After reducing the fraction, the answer is -421/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/90-98/20 20/90-98/40 60/90-98/20 20/90-98/60