Add 81/90 and 30/7
1st number: 81/90, 2nd number: 4 2/7
81/90 + 30/7 is 363/70.
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,
81/90 = 81 × 7/90 × 7 = 567/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
30/7 = 30 × 90/7 × 90 = 2700/630 - Add the two like fractions:
567/630 + 2700/630 = 567 + 2700/630 = 3267/630 - 3267/630 simplified gives 363/70
- So, 81/90 + 30/7 = 363/70
In mixed form: 513/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+60/7 81/90+30/14 81/90+90/7 81/90+30/21 81/90+30/35 81/90+30/49