Add 63/70 and 3/40
63/70 + 3/40 is 39/40.
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,
3/40 = 3 × 7/40 × 7 = 21/280 - Add the two like fractions:
252/280 + 21/280 = 252 + 21/280 = 273/280 - 273/280 simplified gives 39/40
- So, 63/70 + 3/40 = 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/70+6/40 63/70+3/80 63/70+9/40 63/70+15/40 63/70+21/40