Add 21/30 and 60/45
1st number: 21/30, 2nd number: 1 15/45
21/30 + 60/45 is 61/30.
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,
21/30 = 21 × 3/30 × 3 = 63/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
60/45 = 60 × 2/45 × 2 = 120/90 - Add the two like fractions:
63/90 + 120/90 = 63 + 120/90 = 183/90 - 183/90 simplified gives 61/30
- So, 21/30 + 60/45 = 61/30
In mixed form: 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+60/45 21/60+60/45 21/30+60/90 63/30+60/45 21/90+60/45