Add 54/21 and 8/5
1st number: 2 12/21, 2nd number: 1 3/5
54/21 + 8/5 is 146/35.
Steps for adding fractions
- 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,
54/21 = 54 × 5/21 × 5 = 270/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
8/5 = 8 × 21/5 × 21 = 168/105 - Add the two like fractions:
270/105 + 168/105 = 270 + 168/105 = 438/105 - 438/105 simplified gives 146/35
- So, 54/21 + 8/5 = 146/35
In mixed form: 46/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+16/5 54/42+8/5 54/21+8/10 54/21+24/5 54/63+8/5 54/21+8/15 54/21+40/5 54/21+8/25 54/21+56/5 54/21+8/35