Subtract 45/25 from 90/40
1st number: 2 10/40, 2nd number: 1 20/25
90/40 - 45/25 is 9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 25 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 40 × 5 = 200,
90/40 = 90 × 5/40 × 5 = 450/200 - Likewise, for the 2nd fraction, since 25 × 8 = 200,
45/25 = 45 × 8/25 × 8 = 360/200 - Subtract the two like fractions:
450/200 - 360/200 = 450 - 360/200 = 90/200 - After reducing the fraction, the answer is 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-90/25 90/80-45/25 90/40-45/50 90/40-45/75