Add 75/42 and 72/20
1st number: 1 33/42, 2nd number: 3 12/20
75/42 + 72/20 is 377/70.
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,
75/42 = 75 × 10/42 × 10 = 750/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
72/20 = 72 × 21/20 × 21 = 1512/420 - Add the two like fractions:
750/420 + 1512/420 = 750 + 1512/420 = 2262/420 - 2262/420 simplified gives 377/70
- So, 75/42 + 72/20 = 377/70
In mixed form: 527/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/84+72/20 75/42+72/40 75/42+72/60