Subtract 90/72 from 2/4
1st number: 2/4, 2nd number: 1 18/72
2/4 - 90/72 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 4 × 18 = 72,
2/4 = 2 × 18/4 × 18 = 36/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
90/72 = 90 × 1/72 × 1 = 90/72 - Subtract the two like fractions:
36/72 - 90/72 = 36 - 90/72 = -54/72 - After reducing the fraction, the answer is -3/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/8-90/72 6/4-90/72 2/12-90/72 10/4-90/72 2/20-90/72 14/4-90/72 2/28-90/72