Subtract 63/80 from 42/15
1st number: 2 12/15, 2nd number: 63/80
42/15 - 63/80 is 161/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
42/15 = 42 × 16/15 × 16 = 672/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
63/80 = 63 × 3/80 × 3 = 189/240 - Subtract the two like fractions:
672/240 - 189/240 = 672 - 189/240 = 483/240 - After reducing the fraction, the answer is 161/80
- In mixed form: 21/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-63/80 42/30-63/80 42/45-63/80 42/75-63/80