Add 7/20 and 8/70
7/20 + 8/70 is 13/28.
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,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
8/70 = 8 × 2/70 × 2 = 16/140 - Add the two like fractions:
49/140 + 16/140 = 49 + 16/140 = 65/140 - 65/140 simplified gives 13/28
- So, 7/20 + 8/70 = 13/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20+8/70 7/20+16/70 7/40+8/70 21/20+8/70 7/20+24/70 7/60+8/70 35/20+8/70 7/20+40/70 49/20+8/70 7/20+56/70