Add 75/84 and 90/7
1st number: 75/84, 2nd number: 12 6/7
75/84 + 90/7 is 55/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
75/84 = 75 × 1/84 × 1 = 75/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
90/7 = 90 × 12/7 × 12 = 1080/84 - Add the two like fractions:
75/84 + 1080/84 = 75 + 1080/84 = 1155/84 - 1155/84 simplified gives 55/4
- So, 75/84 + 90/7 = 55/4
In mixed form: 133/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/84+90/14 75/84+90/21 75/84+90/35 75/84+90/49