Add 12/45 and 49/84
12/45 + 49/84 is 17/20.
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,
12/45 = 12 × 28/45 × 28 = 336/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
49/84 = 49 × 15/84 × 15 = 735/1260 - Add the two like fractions:
336/1260 + 735/1260 = 336 + 735/1260 = 1071/1260 - 1071/1260 simplified gives 17/20
- So, 12/45 + 49/84 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45+49/84 12/45+98/84 12/90+49/84 36/45+49/84 60/45+49/84 84/45+49/84