Add 70/40 and 42/20
1st number: 1 30/40, 2nd number: 2 2/20
70/40 + 42/20 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
42/20 = 42 × 2/20 × 2 = 84/40 - Add the two like fractions:
70/40 + 84/40 = 70 + 84/40 = 154/40 - 154/40 simplified gives 77/20
- So, 70/40 + 42/20 = 77/20
In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+84/20 70/80+42/20 70/40+42/40 70/40+42/60