Subtract 27/64 from 70/90
70/90 - 27/64 is 205/576.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 64 is 2880
Next, find the equivalent fraction of both fractional numbers with denominator 2880 - For the 1st fraction, since 90 × 32 = 2880,
70/90 = 70 × 32/90 × 32 = 2240/2880 - Likewise, for the 2nd fraction, since 64 × 45 = 2880,
27/64 = 27 × 45/64 × 45 = 1215/2880 - Subtract the two like fractions:
2240/2880 - 1215/2880 = 2240 - 1215/2880 = 1025/2880 - After reducing the fraction, the answer is 205/576
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90-54/64 70/90-81/64