Subtract 10/84 from 28/40
28/40 - 10/84 is 61/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
28/40 = 28 × 21/40 × 21 = 588/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
10/84 = 10 × 10/84 × 10 = 100/840 - Subtract the two like fractions:
588/840 - 100/840 = 588 - 100/840 = 488/840 - After reducing the fraction, the answer is 61/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40-10/84 28/40-20/84 28/80-10/84 84/40-10/84 28/40-30/84 28/40-50/84 28/40-70/84