Add 9/40 and 54/70
9/40 + 54/70 is 279/280.
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,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
54/70 = 54 × 4/70 × 4 = 216/280 - Add the two like fractions:
63/280 + 216/280 = 63 + 216/280 = 279/280 - So, 9/40 + 54/70 = 279/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+54/70 9/80+54/70 27/40+54/70 45/40+54/70 63/40+54/70