Add 42/54 and 75/20
1st number: 42/54, 2nd number: 3 15/20
42/54 + 75/20 is 163/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 20 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 54 × 10 = 540,
42/54 = 42 × 10/54 × 10 = 420/540 - Likewise, for the 2nd fraction, since 20 × 27 = 540,
75/20 = 75 × 27/20 × 27 = 2025/540 - Add the two like fractions:
420/540 + 2025/540 = 420 + 2025/540 = 2445/540 - 2445/540 simplified gives 163/36
- So, 42/54 + 75/20 = 163/36
In mixed form: 419/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/54+75/20 42/54+75/40 42/54+75/60