Add 18/21 and 25/60
18/21 + 25/60 is 107/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
18/21 = 18 × 20/21 × 20 = 360/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
25/60 = 25 × 7/60 × 7 = 175/420 - Add the two like fractions:
360/420 + 175/420 = 360 + 175/420 = 535/420 - 535/420 simplified gives 107/84
- So, 18/21 + 25/60 = 107/84
In mixed form: 123/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/21+25/60 18/21+50/60 18/42+25/60 54/21+25/60 18/21+75/60 18/63+25/60 90/21+25/60