Subtract 42/80 from 98/90
1st number: 1 8/90, 2nd number: 42/80
98/90 - 42/80 is 203/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
98/90 = 98 × 8/90 × 8 = 784/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
42/80 = 42 × 9/80 × 9 = 378/720 - Subtract the two like fractions:
784/720 - 378/720 = 784 - 378/720 = 406/720 - After reducing the fraction, the answer is 203/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/90-84/80