Add 3/4 and 54/42
1st number: 3/4, 2nd number: 1 12/42
3/4 + 54/42 is 57/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
54/42 = 54 × 2/42 × 2 = 108/84 - Add the two like fractions:
63/84 + 108/84 = 63 + 108/84 = 171/84 - 171/84 simplified gives 57/28
- So, 3/4 + 54/42 = 57/28
In mixed form: 21/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/4+54/42 3/8+54/42 3/4+54/84 9/4+54/42 3/12+54/42 15/4+54/42 3/20+54/42 21/4+54/42 3/28+54/42