Add 63/70 and 6/40
63/70 + 6/40 is 21/20.
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,
63/70 = 63 × 4/70 × 4 = 252/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
6/40 = 6 × 7/40 × 7 = 42/280 - Add the two like fractions:
252/280 + 42/280 = 252 + 42/280 = 294/280 - 294/280 simplified gives 21/20
- So, 63/70 + 6/40 = 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: 63/70+12/40 63/70+6/80 63/70+18/40 63/70+30/40 63/70+42/40