Subtract 3/84 from 70/42
1st number: 1 28/42, 2nd number: 3/84
70/42 - 3/84 is 137/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
70/42 = 70 × 2/42 × 2 = 140/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
3/84 = 3 × 1/84 × 1 = 3/84 - Subtract the two like fractions:
140/84 - 3/84 = 140 - 3/84 = 137/84 - In mixed form: 153/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-6/84 70/84-3/84 70/42-9/84 70/42-15/84 70/42-21/84