Add 4/90 and 54/42
1st number: 4/90, 2nd number: 1 12/42
4/90 + 54/42 is 419/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
4/90 = 4 × 7/90 × 7 = 28/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
54/42 = 54 × 15/42 × 15 = 810/630 - Add the two like fractions:
28/630 + 810/630 = 28 + 810/630 = 838/630 - 838/630 simplified gives 419/315
- So, 4/90 + 54/42 = 419/315
In mixed form: 1104/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+54/42 4/90+54/84 12/90+54/42 20/90+54/42 28/90+54/42