Add 15/84 and 90/35
1st number: 15/84, 2nd number: 2 20/35
15/84 + 90/35 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
15/84 = 15 × 5/84 × 5 = 75/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
90/35 = 90 × 12/35 × 12 = 1080/420 - Add the two like fractions:
75/420 + 1080/420 = 75 + 1080/420 = 1155/420 - 1155/420 simplified gives 11/4
- So, 15/84 + 90/35 = 11/4
In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/84+90/35 15/84+90/70 45/84+90/35 75/84+90/35