Add 90/84 and 30/60
1st number: 1 6/84, 2nd number: 30/60
90/84 + 30/60 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
30/60 = 30 × 7/60 × 7 = 210/420 - Add the two like fractions:
450/420 + 210/420 = 450 + 210/420 = 660/420 - 660/420 simplified gives 11/7
- So, 90/84 + 30/60 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+90/60