Add 90/84 and 35/30
1st number: 1 6/84, 2nd number: 1 5/30
90/84 + 35/30 is 47/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 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 30 × 14 = 420,
35/30 = 35 × 14/30 × 14 = 490/420 - Add the two like fractions:
450/420 + 490/420 = 450 + 490/420 = 940/420 - 940/420 simplified gives 47/21
- So, 90/84 + 35/30 = 47/21
In mixed form: 25/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+70/30 90/84+35/60 90/84+35/90