Subtract 18/40 from 90/49
1st number: 1 41/49, 2nd number: 18/40
90/49 - 18/40 is 1359/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 49 × 40 = 1960,
90/49 = 90 × 40/49 × 40 = 3600/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
18/40 = 18 × 49/40 × 49 = 882/1960 - Subtract the two like fractions:
3600/1960 - 882/1960 = 3600 - 882/1960 = 2718/1960 - After reducing the fraction, the answer is 1359/980
- In mixed form: 1379/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/49-36/40 90/98-18/40 90/49-18/80 90/49-54/40 90/49-90/40