Add 75/84 and 7/15
75/84 + 7/15 is 571/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
75/84 = 75 × 5/84 × 5 = 375/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
7/15 = 7 × 28/15 × 28 = 196/420 - Add the two like fractions:
375/420 + 196/420 = 375 + 196/420 = 571/420 - So, 75/84 + 7/15 = 571/420
In mixed form: 1151/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/84+14/15 75/84+7/30 75/84+21/15 75/84+7/45 75/84+35/15 75/84+7/75 75/84+49/15