Subtract 3/72 from 90/20
1st number: 4 10/20, 2nd number: 3/72
90/20 - 3/72 is 107/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 20 × 18 = 360,
90/20 = 90 × 18/20 × 18 = 1620/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
3/72 = 3 × 5/72 × 5 = 15/360 - Subtract the two like fractions:
1620/360 - 15/360 = 1620 - 15/360 = 1605/360 - After reducing the fraction, the answer is 107/24
- In mixed form: 411/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-6/72 90/40-3/72 90/20-9/72 90/60-3/72 90/20-15/72 90/20-21/72