Add 75/90 and 63/84
75/90 + 63/84 is 19/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
75/90 = 75 × 14/90 × 14 = 1050/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
63/84 = 63 × 15/84 × 15 = 945/1260 - Add the two like fractions:
1050/1260 + 945/1260 = 1050 + 945/1260 = 1995/1260 - 1995/1260 simplified gives 19/12
- So, 75/90 + 63/84 = 19/12
In mixed form: 17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: