Add 98/21 and 4/54, Solve 4 14/21 + 4/54 as a fraction

Add 98/21 and 4/54

1^st number: 4 14/21, 2^nd number: 4/54

98/21 + 4/54 is 128/27.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 21 × 18 = 378,
98/21 = 98 × 18/21 × 18 = 1764/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
4/54 = 4 × 7/54 × 7 = 28/378
Add the two like fractions:
1764/378 + 28/378 = 1764 + 28/378 = 1792/378
1792/378 simplified gives 128/27
So, 98/21 + 4/54 = 128/27
In mixed form: 420/27

MathStep (Works offline)

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