Add 28/40 and 98/70
1st number: 28/40, 2nd number: 1 28/70
28/40 + 98/70 is 21/10.
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,
28/40 = 28 × 7/40 × 7 = 196/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
98/70 = 98 × 4/70 × 4 = 392/280 - Add the two like fractions:
196/280 + 392/280 = 196 + 392/280 = 588/280 - 588/280 simplified gives 21/10
- So, 28/40 + 98/70 = 21/10
In mixed form: 21/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+98/70 28/80+98/70 84/40+98/70