Add 75/21 and 60/5, Solve 3 12/21 + 12 0/5 as a fraction

Add 75/21 and 60/5

1^st number: 3 12/21, 2^nd number: 12 0/5

75/21 + 60/5 is 109/7.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
75/21 = 75 × 5/21 × 5 = 375/105
Likewise, for the 2nd fraction, since 5 × 21 = 105,
60/5 = 60 × 21/5 × 21 = 1260/105
Add the two like fractions:
375/105 + 1260/105 = 375 + 1260/105 = 1635/105
1635/105 simplified gives 109/7
So, 75/21 + 60/5 = 109/7
In mixed form: 154/7

MathStep (Works offline)

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