Add 18/70 and 54/40
1st number: 18/70, 2nd number: 1 14/40
18/70 + 54/40 is 45/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
18/70 = 18 × 4/70 × 4 = 72/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
54/40 = 54 × 7/40 × 7 = 378/280 - Add the two like fractions:
72/280 + 378/280 = 72 + 378/280 = 450/280 - 450/280 simplified gives 45/28
- So, 18/70 + 54/40 = 45/28
In mixed form: 117/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+54/40 18/70+54/80 54/70+54/40 90/70+54/40