Subtract 72/40 from 35/90
1st number: 35/90, 2nd number: 1 32/40
35/90 - 72/40 is -127/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
35/90 = 35 × 4/90 × 4 = 140/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
72/40 = 72 × 9/40 × 9 = 648/360 - Subtract the two like fractions:
140/360 - 648/360 = 140 - 648/360 = -508/360 - After reducing the fraction, the answer is -127/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90-72/40 35/90-72/80