Add 30/90 and 45/40
1st number: 30/90, 2nd number: 1 5/40
30/90 + 45/40 is 35/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
30/90 = 30 × 4/90 × 4 = 120/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
45/40 = 45 × 9/40 × 9 = 405/360 - Add the two like fractions:
120/360 + 405/360 = 120 + 405/360 = 525/360 - 525/360 simplified gives 35/24
- So, 30/90 + 45/40 = 35/24
In mixed form: 111/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90+45/40 30/90+90/40 30/90+45/80