Add 18/10 and 70/40
1st number: 1 8/10, 2nd number: 1 30/40
18/10 + 70/40 is 71/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
18/10 = 18 × 4/10 × 4 = 72/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
70/40 = 70 × 1/40 × 1 = 70/40 - Add the two like fractions:
72/40 + 70/40 = 72 + 70/40 = 142/40 - 142/40 simplified gives 71/20
- So, 18/10 + 70/40 = 71/20
In mixed form: 311/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10+70/40 18/20+70/40 18/10+70/80 54/10+70/40 18/30+70/40 90/10+70/40 18/50+70/40 18/70+70/40