Add 15/35 and 20/40
15/35 + 20/40 is 13/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 35 × 8 = 280,
15/35 = 15 × 8/35 × 8 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
20/40 = 20 × 7/40 × 7 = 140/280 - Add the two like fractions:
120/280 + 140/280 = 120 + 140/280 = 260/280 - 260/280 simplified gives 13/14
- So, 15/35 + 20/40 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/35+20/40 15/70+20/40 15/35+20/80 45/35+20/40 15/35+60/40 75/35+20/40