Subtract 42/40 from 25/18
1st number: 1 7/18, 2nd number: 1 2/40
25/18 - 42/40 is 61/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
25/18 = 25 × 20/18 × 20 = 500/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
42/40 = 42 × 9/40 × 9 = 378/360 - Subtract the two like fractions:
500/360 - 378/360 = 500 - 378/360 = 122/360 - After reducing the fraction, the answer is 61/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/18-42/40 25/18-84/40 25/36-42/40 25/18-42/80 75/18-42/40 25/54-42/40 25/90-42/40