Subtract 63/28 from 9/40
1st number: 9/40, 2nd number: 2 7/28
9/40 - 63/28 is -81/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
63/28 = 63 × 10/28 × 10 = 630/280 - Subtract the two like fractions:
63/280 - 630/280 = 63 - 630/280 = -567/280 - After reducing the fraction, the answer is -81/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40-63/28 9/80-63/28 9/40-63/56 27/40-63/28 9/40-63/84 45/40-63/28 63/40-63/28