Add 63/81 and 10/20
63/81 + 10/20 is 23/18.
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,
63/81 = 63 × 20/81 × 20 = 1260/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
10/20 = 10 × 81/20 × 81 = 810/1620 - Add the two like fractions:
1260/1620 + 810/1620 = 1260 + 810/1620 = 2070/1620 - 2070/1620 simplified gives 23/18
- So, 63/81 + 10/20 = 23/18
In mixed form: 15/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/81+10/40 63/81+30/20 63/81+10/60 63/81+50/20 63/81+70/20