Add 28/70 and 63/40
1st number: 28/70, 2nd number: 1 23/40
28/70 + 63/40 is 79/40.
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,
28/70 = 28 × 4/70 × 4 = 112/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
63/40 = 63 × 7/40 × 7 = 441/280 - Add the two like fractions:
112/280 + 441/280 = 112 + 441/280 = 553/280 - 553/280 simplified gives 79/40
- So, 28/70 + 63/40 = 79/40
In mixed form: 139/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+63/40 28/70+63/80 84/70+63/40