Add 15/70 and 40/42
15/70 + 40/42 is 7/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Add the two like fractions:
45/210 + 200/210 = 45 + 200/210 = 245/210 - 245/210 simplified gives 7/6
- So, 15/70 + 40/42 = 7/6
In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70+40/42 15/70+80/42 15/70+40/84 45/70+40/42 75/70+40/42