Add 63/98 and 81/60, Solve 63/98 + 1 21/60 as a fraction

Add 63/98 and 81/60

1^st number: 63/98, 2^nd number: 1 21/60

63/98 + 81/60 is 279/140.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 60 is 2940

Next, find the equivalent fraction of both fractional numbers with denominator 2940
For the 1st fraction, since 98 × 30 = 2940,
63/98 = 63 × 30/98 × 30 = 1890/2940
Likewise, for the 2nd fraction, since 60 × 49 = 2940,
81/60 = 81 × 49/60 × 49 = 3969/2940
Add the two like fractions:
1890/2940 + 3969/2940 = 1890 + 3969/2940 = 5859/2940
5859/2940 simplified gives 279/140
So, 63/98 + 81/60 = 279/140
In mixed form: 1139/140

MathStep (Works offline)

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