Add 20/70 and 10/80
20/70 + 10/80 is 23/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
20/70 = 20 × 8/70 × 8 = 160/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
10/80 = 10 × 7/80 × 7 = 70/560 - Add the two like fractions:
160/560 + 70/560 = 160 + 70/560 = 230/560 - 230/560 simplified gives 23/56
- So, 20/70 + 10/80 = 23/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+10/80 20/70+20/80 60/70+10/80 20/70+30/80 20/70+50/80 20/70+70/80