Add 21/4 and 56/90
1st number: 5 1/4, 2nd number: 56/90
21/4 + 56/90 is 1057/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
21/4 = 21 × 45/4 × 45 = 945/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
56/90 = 56 × 2/90 × 2 = 112/180 - Add the two like fractions:
945/180 + 112/180 = 945 + 112/180 = 1057/180 - So, 21/4 + 56/90 = 1057/180
In mixed form: 5157/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+56/90 21/8+56/90 63/4+56/90 21/12+56/90 21/20+56/90 21/28+56/90