Subtract 70/20 from 84/15
1st number: 5 9/15, 2nd number: 3 10/20
84/15 - 70/20 is 21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
84/15 = 84 × 4/15 × 4 = 336/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
70/20 = 70 × 3/20 × 3 = 210/60 - Subtract the two like fractions:
336/60 - 210/60 = 336 - 210/60 = 126/60 - After reducing the fraction, the answer is 21/10
- In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30-70/20 84/15-70/40 84/45-70/20 84/15-70/60 84/75-70/20