Add 36/42 and 42/20
1st number: 36/42, 2nd number: 2 2/20
36/42 + 42/20 is 207/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
36/42 = 36 × 10/42 × 10 = 360/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Add the two like fractions:
360/420 + 882/420 = 360 + 882/420 = 1242/420 - 1242/420 simplified gives 207/70
- So, 36/42 + 42/20 = 207/70
In mixed form: 267/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+42/20 36/42+84/20 36/84+42/20 36/42+42/40 36/42+42/60