Add 54/42 and 90/63
1st number: 1 12/42, 2nd number: 1 27/63
54/42 + 90/63 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
54/42 = 54 × 3/42 × 3 = 162/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
90/63 = 90 × 2/63 × 2 = 180/126 - Add the two like fractions:
162/126 + 180/126 = 162 + 180/126 = 342/126 - 342/126 simplified gives 19/7
- So, 54/42 + 90/63 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+90/63