Add 70/84 and 20/75
70/84 + 20/75 is 11/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
70/84 = 70 × 25/84 × 25 = 1750/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
20/75 = 20 × 28/75 × 28 = 560/2100 - Add the two like fractions:
1750/2100 + 560/2100 = 1750 + 560/2100 = 2310/2100 - 2310/2100 simplified gives 11/10
- So, 70/84 + 20/75 = 11/10
In mixed form: 11/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84+40/75 70/84+60/75