Add 21/40 and 60/50, Solve 21/40 + 1 10/50 as a fraction

Add 21/40 and 60/50

1^st number: 21/40, 2^nd number: 1 10/50

21/40 + 60/50 is 69/40.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 50 is 200

Next, find the equivalent fraction of both fractional numbers with denominator 200
For the 1st fraction, since 40 × 5 = 200,
21/40 = 21 × 5/40 × 5 = 105/200
Likewise, for the 2nd fraction, since 50 × 4 = 200,
60/50 = 60 × 4/50 × 4 = 240/200
Add the two like fractions:
105/200 + 240/200 = 105 + 240/200 = 345/200
345/200 simplified gives 69/40
So, 21/40 + 60/50 = 69/40
In mixed form: 129/40

MathStep (Works offline)

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