Add 28/40 and 90/54
1st number: 28/40, 2nd number: 1 36/54
28/40 + 90/54 is 71/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 54 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
28/40 = 28 × 27/40 × 27 = 756/1080 - Likewise, for the 2nd fraction, since 54 × 20 = 1080,
90/54 = 90 × 20/54 × 20 = 1800/1080 - Add the two like fractions:
756/1080 + 1800/1080 = 756 + 1800/1080 = 2556/1080 - 2556/1080 simplified gives 71/30
- So, 28/40 + 90/54 = 71/30
In mixed form: 211/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+90/54 28/80+90/54 84/40+90/54