Add 90/98 and 4/81
90/98 + 4/81 is 3841/3969.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 81 is 7938
Next, find the equivalent fraction of both fractional numbers with denominator 7938 - For the 1st fraction, since 98 × 81 = 7938,
90/98 = 90 × 81/98 × 81 = 7290/7938 - Likewise, for the 2nd fraction, since 81 × 98 = 7938,
4/81 = 4 × 98/81 × 98 = 392/7938 - Add the two like fractions:
7290/7938 + 392/7938 = 7290 + 392/7938 = 7682/7938 - 7682/7938 simplified gives 3841/3969
- So, 90/98 + 4/81 = 3841/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/98+8/81 90/98+12/81 90/98+20/81 90/98+28/81