Add 90/45 and 15/84
1st number: 2 0/45, 2nd number: 15/84
90/45 + 15/84 is 61/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
90/45 = 90 × 28/45 × 28 = 2520/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
15/84 = 15 × 15/84 × 15 = 225/1260 - Add the two like fractions:
2520/1260 + 225/1260 = 2520 + 225/1260 = 2745/1260 - 2745/1260 simplified gives 61/28
- So, 90/45 + 15/84 = 61/28
In mixed form: 25/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/45+30/84 90/45+45/84 90/45+75/84