Subtract 70/81 from 4/54
4/54 - 70/81 is -64/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
4/54 = 4 × 3/54 × 3 = 12/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
70/81 = 70 × 2/81 × 2 = 140/162 - Subtract the two like fractions:
12/162 - 140/162 = 12 - 140/162 = -128/162 - After reducing the fraction, the answer is -64/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/54-70/81 12/54-70/81 20/54-70/81 28/54-70/81