Add 60/21 and 24/40, Solve 2 18/21 + 24/40 as a fraction

Add 60/21 and 24/40

1^st number: 2 18/21, 2^nd number: 24/40

60/21 + 24/40 is 121/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 21 × 40 = 840,
60/21 = 60 × 40/21 × 40 = 2400/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
24/40 = 24 × 21/40 × 21 = 504/840
Add the two like fractions:
2400/840 + 504/840 = 2400 + 504/840 = 2904/840
2904/840 simplified gives 121/35
So, 60/21 + 24/40 = 121/35
In mixed form: 316/35

MathStep (Works offline)

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