Subtract 70/20 from 54/30
1st number: 1 24/30, 2nd number: 3 10/20
54/30 - 70/20 is -17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
54/30 = 54 × 2/30 × 2 = 108/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
70/20 = 70 × 3/20 × 3 = 210/60 - Subtract the two like fractions:
108/60 - 210/60 = 108 - 210/60 = -102/60 - After reducing the fraction, the answer is -17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/60-70/20 54/30-70/40 54/90-70/20 54/30-70/60