Add 20/60 and 45/7
1st number: 20/60, 2nd number: 6 3/7
20/60 + 45/7 is 142/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
20/60 = 20 × 7/60 × 7 = 140/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
45/7 = 45 × 60/7 × 60 = 2700/420 - Add the two like fractions:
140/420 + 2700/420 = 140 + 2700/420 = 2840/420 - 2840/420 simplified gives 142/21
- So, 20/60 + 45/7 = 142/21
In mixed form: 616/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/60+45/7 20/60+90/7 20/60+45/14 20/60+45/21 20/60+45/35 20/60+45/49