Add 81/84 and 5/45
81/84 + 5/45 is 271/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
81/84 = 81 × 15/84 × 15 = 1215/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
5/45 = 5 × 28/45 × 28 = 140/1260 - Add the two like fractions:
1215/1260 + 140/1260 = 1215 + 140/1260 = 1355/1260 - 1355/1260 simplified gives 271/252
- So, 81/84 + 5/45 = 271/252
In mixed form: 119/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/84+10/45 81/84+5/90 81/84+15/45 81/84+25/45 81/84+35/45