Add 21/4 and 75/30
1st number: 5 1/4, 2nd number: 2 15/30
21/4 + 75/30 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
21/4 = 21 × 15/4 × 15 = 315/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
75/30 = 75 × 2/30 × 2 = 150/60 - Add the two like fractions:
315/60 + 150/60 = 315 + 150/60 = 465/60 - 465/60 simplified gives 31/4
- So, 21/4 + 75/30 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+75/30 21/8+75/30 21/4+75/60 63/4+75/30 21/12+75/30 21/4+75/90 21/20+75/30 21/28+75/30