Add 21/4 and 90/30
1st number: 5 1/4, 2nd number: 3 0/30
21/4 + 90/30 is 33/4.
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,
90/30 = 90 × 2/30 × 2 = 180/60 - Add the two like fractions:
315/60 + 180/60 = 315 + 180/60 = 495/60 - 495/60 simplified gives 33/4
- So, 21/4 + 90/30 = 33/4
In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+90/30 21/8+90/30 21/4+90/60 63/4+90/30 21/12+90/30 21/20+90/30 21/28+90/30