Add 70/40 and 30/45
1st number: 1 30/40, 2nd number: 30/45
70/40 + 30/45 is 29/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
70/40 = 70 × 9/40 × 9 = 630/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
30/45 = 30 × 8/45 × 8 = 240/360 - Add the two like fractions:
630/360 + 240/360 = 630 + 240/360 = 870/360 - 870/360 simplified gives 29/12
- So, 70/40 + 30/45 = 29/12
In mixed form: 25/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+60/45 70/80+30/45 70/40+30/90 70/40+90/45