Add 9/45 and 4/21
9/45 + 4/21 is 41/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
9/45 = 9 × 7/45 × 7 = 63/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
4/21 = 4 × 15/21 × 15 = 60/315 - Add the two like fractions:
63/315 + 60/315 = 63 + 60/315 = 123/315 - 123/315 simplified gives 41/105
- So, 9/45 + 4/21 = 41/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/45+4/21 9/45+8/21 9/90+4/21 9/45+4/42 27/45+4/21 9/45+12/21 9/45+4/63 9/45+20/21 63/45+4/21 9/45+28/21