Add 98/20 and 2/21, Solve 4 18/20 + 2/21 as a fraction

Add 98/20 and 2/21

1^st number: 4 18/20, 2^nd number: 2/21

98/20 + 2/21 is 1049/210.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
98/20 = 98 × 21/20 × 21 = 2058/420
Likewise, for the 2nd fraction, since 21 × 20 = 420,
2/21 = 2 × 20/21 × 20 = 40/420
Add the two like fractions:
2058/420 + 40/420 = 2058 + 40/420 = 2098/420
2098/420 simplified gives 1049/210
So, 98/20 + 2/21 = 1049/210
In mixed form: 4209/210

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad