Add 12/90 and 75/70
1st number: 12/90, 2nd number: 1 5/70
12/90 + 75/70 is 253/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 70 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 70 × 9 = 630,
75/70 = 75 × 9/70 × 9 = 675/630 - Add the two like fractions:
84/630 + 675/630 = 84 + 675/630 = 759/630 - 759/630 simplified gives 253/210
- So, 12/90 + 75/70 = 253/210
In mixed form: 143/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+75/70 36/90+75/70 60/90+75/70 84/90+75/70