Add 21/60 and 90/4
1st number: 21/60, 2nd number: 22 2/4
21/60 + 90/4 is 457/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 4 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Likewise, for the 2nd fraction, since 4 × 15 = 60,
90/4 = 90 × 15/4 × 15 = 1350/60 - Add the two like fractions:
21/60 + 1350/60 = 21 + 1350/60 = 1371/60 - 1371/60 simplified gives 457/20
- So, 21/60 + 90/4 = 457/20
In mixed form: 2217/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+90/4 21/60+90/8 63/60+90/4 21/60+90/12 21/60+90/20 21/60+90/28