Subtract 45/48 from 21/15
1st number: 1 6/15, 2nd number: 45/48
21/15 - 45/48 is 37/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
45/48 = 45 × 5/48 × 5 = 225/240 - Subtract the two like fractions:
336/240 - 225/240 = 336 - 225/240 = 111/240 - After reducing the fraction, the answer is 37/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-45/48 21/15-90/48 21/30-45/48 21/15-45/96 63/15-45/48 21/45-45/48 21/75-45/48