Subtract 42/12 from 25/45
1st number: 25/45, 2nd number: 3 6/12
25/45 - 42/12 is -53/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
25/45 = 25 × 4/45 × 4 = 100/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
42/12 = 42 × 15/12 × 15 = 630/180 - Subtract the two like fractions:
100/180 - 630/180 = 100 - 630/180 = -530/180 - After reducing the fraction, the answer is -53/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45-42/12 25/45-84/12 25/90-42/12 25/45-42/24 75/45-42/12 25/45-42/36 25/45-42/60 25/45-42/84