Add 54/21 and 70/4
1st number: 2 12/21, 2nd number: 17 2/4
54/21 + 70/4 is 281/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
70/4 = 70 × 21/4 × 21 = 1470/84 - Add the two like fractions:
216/84 + 1470/84 = 216 + 1470/84 = 1686/84 - 1686/84 simplified gives 281/14
- So, 54/21 + 70/4 = 281/14
In mixed form: 201/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+70/4 54/21+70/8 54/63+70/4 54/21+70/12 54/21+70/20 54/21+70/28