Add 20/81 and 4/98
20/81 + 4/98 is 1142/3969.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 98 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 81 × 98 = 7938,
20/81 = 20 × 98/81 × 98 = 1960/7938 - Likewise, for the 2nd fraction, since 98 × 81 = 7938,
4/98 = 4 × 81/98 × 81 = 324/7938 - Add the two like fractions:
1960/7938 + 324/7938 = 1960 + 324/7938 = 2284/7938 - 2284/7938 simplified gives 1142/3969
- So, 20/81 + 4/98 = 1142/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/81+4/98 20/81+8/98 60/81+4/98 20/81+12/98 20/81+20/98 20/81+28/98