Add 75/80 and 50/42
1st number: 75/80, 2nd number: 1 8/42
75/80 + 50/42 is 715/336.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
75/80 = 75 × 21/80 × 21 = 1575/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
50/42 = 50 × 40/42 × 40 = 2000/1680 - Add the two like fractions:
1575/1680 + 2000/1680 = 1575 + 2000/1680 = 3575/1680 - 3575/1680 simplified gives 715/336
- So, 75/80 + 50/42 = 715/336
In mixed form: 243/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/80+50/84