Subtract 21/4 from 25/15
1st number: 1 10/15, 2nd number: 5 1/4
25/15 - 21/4 is -43/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
25/15 = 25 × 4/15 × 4 = 100/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
21/4 = 21 × 15/4 × 15 = 315/60 - Subtract the two like fractions:
100/60 - 315/60 = 100 - 315/60 = -215/60 - After reducing the fraction, the answer is -43/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/15-21/4 25/15-42/4 25/30-21/4 25/15-21/8 75/15-21/4 25/15-63/4 25/45-21/4 25/15-21/12 25/75-21/4 25/15-21/20 25/15-21/28