Add 20/45 and 90/84
1st number: 20/45, 2nd number: 1 6/84
20/45 + 90/84 is 191/126.
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,
20/45 = 20 × 28/45 × 28 = 560/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
90/84 = 90 × 15/84 × 15 = 1350/1260 - Add the two like fractions:
560/1260 + 1350/1260 = 560 + 1350/1260 = 1910/1260 - 1910/1260 simplified gives 191/126
- So, 20/45 + 90/84 = 191/126
In mixed form: 165/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/45+90/84 20/90+90/84 60/45+90/84