Subtract 45/90 from 32/40
32/40 - 45/90 is 3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
32/40 = 32 × 9/40 × 9 = 288/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
45/90 = 45 × 4/90 × 4 = 180/360 - Subtract the two like fractions:
288/360 - 180/360 = 288 - 180/360 = 108/360 - After reducing the fraction, the answer is 3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/40-45/90 32/80-45/90 96/40-45/90