Add 45/40 and 18/30
1st number: 1 5/40, 2nd number: 18/30
45/40 + 18/30 is 69/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Add the two like fractions:
135/120 + 72/120 = 135 + 72/120 = 207/120 - 207/120 simplified gives 69/40
- So, 45/40 + 18/30 = 69/40
In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40+18/30 45/40+36/30 45/80+18/30 45/40+18/60 45/40+54/30 45/40+18/90 45/40+90/30