Add 12/90 and 5/7
12/90 + 5/7 is 89/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 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 7 × 90 = 630,
5/7 = 5 × 90/7 × 90 = 450/630 - Add the two like fractions:
84/630 + 450/630 = 84 + 450/630 = 534/630 - 534/630 simplified gives 89/105
- So, 12/90 + 5/7 = 89/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/90+5/7 12/90+10/7 12/90+5/14 36/90+5/7 12/90+15/7 12/90+5/21 60/90+5/7 12/90+25/7 12/90+5/35 84/90+5/7 12/90+35/7 12/90+5/49