Subtract 90/36 from 7/40
1st number: 7/40, 2nd number: 2 18/36
7/40 - 90/36 is -93/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 36 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
7/40 = 7 × 9/40 × 9 = 63/360 - Likewise, for the 2nd fraction, since 36 × 10 = 360,
90/36 = 90 × 10/36 × 10 = 900/360 - Subtract the two like fractions:
63/360 - 900/360 = 63 - 900/360 = -837/360 - After reducing the fraction, the answer is -93/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-90/36 7/80-90/36 7/40-90/72 21/40-90/36 35/40-90/36 49/40-90/36