Add 98/20 and 1/81
1st number: 4 18/20, 2nd number: 1/81
98/20 + 1/81 is 3979/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
98/20 = 98 × 81/20 × 81 = 7938/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
1/81 = 1 × 20/81 × 20 = 20/1620 - Add the two like fractions:
7938/1620 + 20/1620 = 7938 + 20/1620 = 7958/1620 - 7958/1620 simplified gives 3979/810
- So, 98/20 + 1/81 = 3979/810
In mixed form: 4739/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20+2/81 98/40+1/81 98/20+3/81 98/60+1/81 98/20+5/81 98/20+7/81