Subtract 7/90 from 7/64
7/64 - 7/90 is 91/2880.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 90 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 64 × 45 = 2880,
7/64 = 7 × 45/64 × 45 = 315/2880 - Likewise, for the 2nd fraction, since 90 × 32 = 2880,
7/90 = 7 × 32/90 × 32 = 224/2880 - Subtract the two like fractions:
315/2880 - 224/2880 = 315 - 224/2880 = 91/2880
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/64-7/90 7/64-14/90 21/64-7/90 7/64-21/90 35/64-7/90 7/64-35/90 49/64-7/90 7/64-49/90