Add 12/30 and 10/21
12/30 + 10/21 is 92/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
10/21 = 10 × 10/21 × 10 = 100/210 - Add the two like fractions:
84/210 + 100/210 = 84 + 100/210 = 184/210 - 184/210 simplified gives 92/105
- So, 12/30 + 10/21 = 92/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/30+10/21 12/30+20/21 12/60+10/21 12/30+10/42 36/30+10/21 12/30+30/21 12/90+10/21 12/30+10/63 60/30+10/21 12/30+50/21 84/30+10/21 12/30+70/21