Add 75/20 and 25/42
1st number: 3 15/20, 2nd number: 25/42
75/20 + 25/42 is 365/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
75/20 = 75 × 21/20 × 21 = 1575/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
25/42 = 25 × 10/42 × 10 = 250/420 - Add the two like fractions:
1575/420 + 250/420 = 1575 + 250/420 = 1825/420 - 1825/420 simplified gives 365/84
- So, 75/20 + 25/42 = 365/84
In mixed form: 429/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/20+50/42 75/40+25/42 75/20+25/84 75/20+75/42 75/60+25/42