Add 21/45 and 3/8
21/45 + 3/8 is 101/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
3/8 = 3 × 45/8 × 45 = 135/360 - Add the two like fractions:
168/360 + 135/360 = 168 + 135/360 = 303/360 - 303/360 simplified gives 101/120
- So, 21/45 + 3/8 = 101/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+3/8 21/45+6/8 21/90+3/8 21/45+3/16 63/45+3/8 21/45+9/8 21/45+3/24 21/45+15/8 21/45+3/40 21/45+21/8 21/45+3/56