Add 70/75 and 15/42
70/75 + 15/42 is 271/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 75 × 14 = 1050,
70/75 = 70 × 14/75 × 14 = 980/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
15/42 = 15 × 25/42 × 25 = 375/1050 - Add the two like fractions:
980/1050 + 375/1050 = 980 + 375/1050 = 1355/1050 - 1355/1050 simplified gives 271/210
- So, 70/75 + 15/42 = 271/210
In mixed form: 161/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/75+30/42 70/75+15/84 70/75+45/42 70/75+75/42