Add 90/42 and 45/63
1st number: 2 6/42, 2nd number: 45/63
90/42 + 45/63 is 20/7.
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,
90/42 = 90 × 3/42 × 3 = 270/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
45/63 = 45 × 2/63 × 2 = 90/126 - Add the two like fractions:
270/126 + 90/126 = 270 + 90/126 = 360/126 - 360/126 simplified gives 20/7
- So, 90/42 + 45/63 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+90/63 90/84+45/63