Add 90/60 and 18/80
1st number: 1 30/60, 2nd number: 18/80
90/60 + 18/80 is 69/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 60 × 4 = 240,
90/60 = 90 × 4/60 × 4 = 360/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
18/80 = 18 × 3/80 × 3 = 54/240 - Add the two like fractions:
360/240 + 54/240 = 360 + 54/240 = 414/240 - 414/240 simplified gives 69/40
- So, 90/60 + 18/80 = 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: 90/60+36/80 90/60+54/80 90/60+90/80