Subtract 90/49 from 18/5
1st number: 3 3/5, 2nd number: 1 41/49
18/5 - 90/49 is 432/245.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 49 is 245
Next, find the equivalent fraction of both fractional numbers with denominator 245 - For the 1st fraction, since 5 × 49 = 245,
18/5 = 18 × 49/5 × 49 = 882/245 - Likewise, for the 2nd fraction, since 49 × 5 = 245,
90/49 = 90 × 5/49 × 5 = 450/245 - Subtract the two like fractions:
882/245 - 450/245 = 882 - 450/245 = 432/245 - In mixed form: 1187/245
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-90/49 18/10-90/49 18/5-90/98 54/5-90/49 18/15-90/49 90/5-90/49 18/25-90/49 18/35-90/49