Subtract 98/80 from 42/36
1st number: 1 6/36, 2nd number: 1 18/80
42/36 - 98/80 is -7/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 36 × 20 = 720,
42/36 = 42 × 20/36 × 20 = 840/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
98/80 = 98 × 9/80 × 9 = 882/720 - Subtract the two like fractions:
840/720 - 882/720 = 840 - 882/720 = -42/720 - After reducing the fraction, the answer is -7/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/36-98/80 42/72-98/80