Subtract 63/30 from 21/16
1st number: 1 5/16, 2nd number: 2 3/30
21/16 - 63/30 is -63/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
63/30 = 63 × 8/30 × 8 = 504/240 - Subtract the two like fractions:
315/240 - 504/240 = 315 - 504/240 = -189/240 - After reducing the fraction, the answer is -63/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16-63/30 21/32-63/30 21/16-63/60 63/16-63/30 21/48-63/30 21/16-63/90 21/80-63/30