Add 42/28 and 18/20
1st number: 1 14/28, 2nd number: 18/20
42/28 + 18/20 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
42/28 = 42 × 5/28 × 5 = 210/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Add the two like fractions:
210/140 + 126/140 = 210 + 126/140 = 336/140 - 336/140 simplified gives 12/5
- So, 42/28 + 18/20 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28+18/20 42/28+36/20 42/56+18/20 42/28+18/40 42/28+54/20 42/84+18/20 42/28+18/60 42/28+90/20