Add 18/81 and 12/20
18/81 + 12/20 is 37/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
18/81 = 18 × 20/81 × 20 = 360/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
12/20 = 12 × 81/20 × 81 = 972/1620 - Add the two like fractions:
360/1620 + 972/1620 = 360 + 972/1620 = 1332/1620 - 1332/1620 simplified gives 37/45
- So, 18/81 + 12/20 = 37/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+12/20 18/81+24/20 18/81+12/40 54/81+12/20 18/81+36/20 18/81+12/60 90/81+12/20 18/81+60/20 18/81+84/20