Add 90/30 and 10/7
1st number: 3 0/30, 2nd number: 1 3/7
90/30 + 10/7 is 31/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
90/30 = 90 × 7/30 × 7 = 630/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
10/7 = 10 × 30/7 × 30 = 300/210 - Add the two like fractions:
630/210 + 300/210 = 630 + 300/210 = 930/210 - 930/210 simplified gives 31/7
- So, 90/30 + 10/7 = 31/7
In mixed form: 43/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+20/7 90/60+10/7 90/30+10/14 90/30+30/7 90/30+10/21 90/30+50/7 90/30+10/35 90/30+70/7 90/30+10/49