Subtract 21/15 from 84/16
1st number: 5 4/16, 2nd number: 1 6/15
84/16 - 21/15 is 77/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 15 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
84/16 = 84 × 15/16 × 15 = 1260/240 - Likewise, for the 2nd fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Subtract the two like fractions:
1260/240 - 336/240 = 1260 - 336/240 = 924/240 - After reducing the fraction, the answer is 77/20
- In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/16-42/15 84/32-21/15 84/16-21/30 84/16-63/15 84/48-21/15 84/16-21/45 84/80-21/15 84/16-21/75