Add 20/70 and 27/90
20/70 + 27/90 is 41/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Add the two like fractions:
180/630 + 189/630 = 180 + 189/630 = 369/630 - 369/630 simplified gives 41/70
- So, 20/70 + 27/90 = 41/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+27/90 20/70+54/90 60/70+27/90 20/70+81/90