Add 25/80 and 81/84
25/80 + 81/84 is 143/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
25/80 = 25 × 21/80 × 21 = 525/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
81/84 = 81 × 20/84 × 20 = 1620/1680 - Add the two like fractions:
525/1680 + 1620/1680 = 525 + 1620/1680 = 2145/1680 - 2145/1680 simplified gives 143/112
- So, 25/80 + 81/84 = 143/112
In mixed form: 131/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/80+81/84 75/80+81/84