Add 6/40 and 63/70
6/40 + 63/70 is 21/20.
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,
6/40 = 6 × 7/40 × 7 = 42/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
63/70 = 63 × 4/70 × 4 = 252/280 - Add the two like fractions:
42/280 + 252/280 = 42 + 252/280 = 294/280 - 294/280 simplified gives 21/20
- So, 6/40 + 63/70 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/40+63/70 6/80+63/70 18/40+63/70 30/40+63/70 42/40+63/70