Add 7/70 and 40/20
1st number: 7/70, 2nd number: 2 0/20
7/70 + 40/20 is 21/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
7/70 = 7 × 2/70 × 2 = 14/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
40/20 = 40 × 7/20 × 7 = 280/140 - Add the two like fractions:
14/140 + 280/140 = 14 + 280/140 = 294/140 - 294/140 simplified gives 21/10
- So, 7/70 + 40/20 = 21/10
In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70+40/20 7/70+80/20 21/70+40/20 7/70+40/60 35/70+40/20 49/70+40/20