Add 20/70 and 27/40
20/70 + 27/40 is 269/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
20/70 = 20 × 4/70 × 4 = 80/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
27/40 = 27 × 7/40 × 7 = 189/280 - Add the two like fractions:
80/280 + 189/280 = 80 + 189/280 = 269/280 - So, 20/70 + 27/40 = 269/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+27/40 20/70+54/40 20/70+27/80 60/70+27/40 20/70+81/40