Add 15/42 and 45/70
15/42 + 45/70 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
45/70 = 45 × 3/70 × 3 = 135/210 - Add the two like fractions:
75/210 + 135/210 = 75 + 135/210 = 210/210 - 210/210 simplified gives 1/1
- So, 15/42 + 45/70 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+45/70 15/42+90/70 15/84+45/70 45/42+45/70 75/42+45/70