Subtract 84/20 from 90/35
1st number: 2 20/35, 2nd number: 4 4/20
90/35 - 84/20 is -57/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
90/35 = 90 × 4/35 × 4 = 360/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
84/20 = 84 × 7/20 × 7 = 588/140 - Subtract the two like fractions:
360/140 - 588/140 = 360 - 588/140 = -228/140 - After reducing the fraction, the answer is -57/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-84/20 90/35-84/40 90/35-84/60