Add 40/20 and 15/70
1st number: 2 0/20, 2nd number: 15/70
40/20 + 15/70 is 31/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
40/20 = 40 × 7/20 × 7 = 280/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
15/70 = 15 × 2/70 × 2 = 30/140 - Add the two like fractions:
280/140 + 30/140 = 280 + 30/140 = 310/140 - 310/140 simplified gives 31/14
- So, 40/20 + 15/70 = 31/14
In mixed form: 23/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20+15/70 40/20+30/70 40/20+45/70 40/60+15/70 40/20+75/70