Add 12/90 and 10/42
12/90 + 10/42 is 13/35.
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,
12/90 = 12 × 7/90 × 7 = 84/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
10/42 = 10 × 15/42 × 15 = 150/630 - Add the two like fractions:
84/630 + 150/630 = 84 + 150/630 = 234/630 - 234/630 simplified gives 13/35
- So, 12/90 + 10/42 = 13/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+10/42 12/90+20/42 12/90+10/84 36/90+10/42 12/90+30/42 60/90+10/42 12/90+50/42 84/90+10/42 12/90+70/42