Subtract 18/64 from 18/20
18/20 - 18/64 is 99/160.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 64 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 20 × 16 = 320,
18/20 = 18 × 16/20 × 16 = 288/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
18/64 = 18 × 5/64 × 5 = 90/320 - Subtract the two like fractions:
288/320 - 90/320 = 288 - 90/320 = 198/320 - After reducing the fraction, the answer is 99/160
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-18/64 18/20-36/64 18/40-18/64 54/20-18/64 18/20-54/64 18/60-18/64 90/20-18/64 18/20-90/64