Subtract 35/80 from 63/42
1st number: 1 21/42, 2nd number: 35/80
63/42 - 35/80 is 17/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
63/42 = 63 × 40/42 × 40 = 2520/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
35/80 = 35 × 21/80 × 21 = 735/1680 - Subtract the two like fractions:
2520/1680 - 735/1680 = 2520 - 735/1680 = 1785/1680 - After reducing the fraction, the answer is 17/16
- In mixed form: 11/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-70/80 63/84-35/80