Add 15/40 and 1/70
15/40 + 1/70 is 109/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
15/40 = 15 × 7/40 × 7 = 105/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
1/70 = 1 × 4/70 × 4 = 4/280 - Add the two like fractions:
105/280 + 4/280 = 105 + 4/280 = 109/280 - So, 15/40 + 1/70 = 109/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+1/70 15/40+2/70 15/80+1/70 45/40+1/70 15/40+3/70 75/40+1/70 15/40+5/70 15/40+7/70