Subtract 16/40 from 80/90
80/90 - 16/40 is 22/45.
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,
80/90 = 80 × 4/90 × 4 = 320/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
16/40 = 16 × 9/40 × 9 = 144/360 - Subtract the two like fractions:
320/360 - 144/360 = 320 - 144/360 = 176/360 - After reducing the fraction, the answer is 22/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/90-32/40 80/90-16/80 80/90-48/40 80/90-80/40