Subtract 5/20 from 16/45
16/45 - 5/20 is 19/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
16/45 = 16 × 4/45 × 4 = 64/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Subtract the two like fractions:
64/180 - 45/180 = 64 - 45/180 = 19/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/45-5/20 16/45-10/20 16/90-5/20 16/45-5/40 48/45-5/20 16/45-15/20 16/45-5/60 80/45-5/20 16/45-25/20 16/45-35/20