Add 54/18 and 70/80
1st number: 3 0/18, 2nd number: 70/80
54/18 + 70/80 is 31/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
54/18 = 54 × 40/18 × 40 = 2160/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
70/80 = 70 × 9/80 × 9 = 630/720 - Add the two like fractions:
2160/720 + 630/720 = 2160 + 630/720 = 2790/720 - 2790/720 simplified gives 31/8
- So, 54/18 + 70/80 = 31/8
In mixed form: 37/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/36+70/80 54/90+70/80