Add 27/70 and 20/80
27/70 + 20/80 is 89/140.
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,
27/70 = 27 × 8/70 × 8 = 216/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
20/80 = 20 × 7/80 × 7 = 140/560 - Add the two like fractions:
216/560 + 140/560 = 216 + 140/560 = 356/560 - 356/560 simplified gives 89/140
- So, 27/70 + 20/80 = 89/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/70+20/80 27/70+40/80 81/70+20/80 27/70+60/80