Subtract 54/64 from 70/20
1st number: 3 10/20, 2nd number: 54/64
70/20 - 54/64 is 85/32.
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,
70/20 = 70 × 16/20 × 16 = 1120/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
54/64 = 54 × 5/64 × 5 = 270/320 - Subtract the two like fractions:
1120/320 - 270/320 = 1120 - 270/320 = 850/320 - After reducing the fraction, the answer is 85/32
- In mixed form: 221/32
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-54/64 70/60-54/64