Add 4/90 and 12/42
4/90 + 12/42 is 104/315.
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,
12/42 = 12 × 15/42 × 15 = 180/630 - Add the two like fractions:
28/630 + 180/630 = 28 + 180/630 = 208/630 - 208/630 simplified gives 104/315
- So, 4/90 + 12/42 = 104/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/90+12/42 4/90+24/42 4/90+12/84 12/90+12/42 4/90+36/42 20/90+12/42 4/90+60/42 28/90+12/42 4/90+84/42