Add 3/7 and 20/80
3/7 + 20/80 is 19/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
3/7 = 3 × 80/7 × 80 = 240/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
20/80 = 20 × 7/80 × 7 = 140/560 - Add the two like fractions:
240/560 + 140/560 = 240 + 140/560 = 380/560 - 380/560 simplified gives 19/28
- So, 3/7 + 20/80 = 19/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7+20/80 3/7+40/80 3/14+20/80 9/7+20/80 3/7+60/80 3/21+20/80 15/7+20/80 3/35+20/80 21/7+20/80 3/49+20/80