Add 18/60 and 1/21
18/60 + 1/21 is 73/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
18/60 = 18 × 7/60 × 7 = 126/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
1/21 = 1 × 20/21 × 20 = 20/420 - Add the two like fractions:
126/420 + 20/420 = 126 + 20/420 = 146/420 - 146/420 simplified gives 73/210
- So, 18/60 + 1/21 = 73/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/60+1/21 18/60+2/21 18/60+1/42 54/60+1/21 18/60+3/21 18/60+1/63 90/60+1/21 18/60+5/21 18/60+7/21