Subtract 84/80 from 70/30
1st number: 2 10/30, 2nd number: 1 4/80
70/30 - 84/80 is 77/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
70/30 = 70 × 8/30 × 8 = 560/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
84/80 = 84 × 3/80 × 3 = 252/240 - Subtract the two like fractions:
560/240 - 252/240 = 560 - 252/240 = 308/240 - After reducing the fraction, the answer is 77/60
- In mixed form: 117/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/60-84/80 70/90-84/80