Subtract 8/40 from 75/90
75/90 - 8/40 is 19/30.
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,
75/90 = 75 × 4/90 × 4 = 300/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
8/40 = 8 × 9/40 × 9 = 72/360 - Subtract the two like fractions:
300/360 - 72/360 = 300 - 72/360 = 228/360 - After reducing the fraction, the answer is 19/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/90-16/40 75/90-8/80 75/90-24/40 75/90-56/40