Add 7/28 and 20/80
7/28 + 20/80 is 1/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
7/28 = 7 × 20/28 × 20 = 140/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
20/80 = 20 × 7/80 × 7 = 140/560 - Add the two like fractions:
140/560 + 140/560 = 140 + 140/560 = 280/560 - 280/560 simplified gives 1/2
- So, 7/28 + 20/80 = 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+20/80 7/28+40/80 7/56+20/80 21/28+20/80 7/28+60/80 7/84+20/80 35/28+20/80 49/28+20/80