Add 40/70 and 28/45
40/70 + 28/45 is 376/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
40/70 = 40 × 9/70 × 9 = 360/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Add the two like fractions:
360/630 + 392/630 = 360 + 392/630 = 752/630 - 752/630 simplified gives 376/315
- So, 40/70 + 28/45 = 376/315
In mixed form: 161/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+28/45 40/70+56/45 40/70+28/90 40/70+84/45