Add 81/30 and 5/45
1st number: 2 21/30, 2nd number: 5/45
81/30 + 5/45 is 253/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
81/30 = 81 × 3/30 × 3 = 243/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
5/45 = 5 × 2/45 × 2 = 10/90 - Add the two like fractions:
243/90 + 10/90 = 243 + 10/90 = 253/90 - So, 81/30 + 5/45 = 253/90
In mixed form: 273/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+10/45 81/60+5/45 81/30+5/90 81/30+15/45 81/90+5/45 81/30+25/45 81/30+35/45