Add 21/32 and 28/90
21/32 + 28/90 is 1393/1440.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 90 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 32 × 45 = 1440,
21/32 = 21 × 45/32 × 45 = 945/1440 - Likewise, for the 2nd fraction, since 90 × 16 = 1440,
28/90 = 28 × 16/90 × 16 = 448/1440 - Add the two like fractions:
945/1440 + 448/1440 = 945 + 448/1440 = 1393/1440 - So, 21/32 + 28/90 = 1393/1440
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/32+28/90 21/32+56/90 21/64+28/90 63/32+28/90 21/32+84/90 21/96+28/90