Add 21/18 and 20/25
1st number: 1 3/18, 2nd number: 20/25
21/18 + 20/25 is 59/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 25 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 18 × 25 = 450,
21/18 = 21 × 25/18 × 25 = 525/450 - Likewise, for the 2nd fraction, since 25 × 18 = 450,
20/25 = 20 × 18/25 × 18 = 360/450 - Add the two like fractions:
525/450 + 360/450 = 525 + 360/450 = 885/450 - 885/450 simplified gives 59/30
- So, 21/18 + 20/25 = 59/30
In mixed form: 129/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+20/25 21/18+40/25 21/36+20/25 21/18+20/50 63/18+20/25 21/18+60/25 21/54+20/25 21/18+20/75 21/90+20/25