Add 7/28 and 84/90
7/28 + 84/90 is 71/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
7/28 = 7 × 45/28 × 45 = 315/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
84/90 = 84 × 14/90 × 14 = 1176/1260 - Add the two like fractions:
315/1260 + 1176/1260 = 315 + 1176/1260 = 1491/1260 - 1491/1260 simplified gives 71/60
- So, 7/28 + 84/90 = 71/60
In mixed form: 111/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+84/90 7/56+84/90 21/28+84/90 7/84+84/90 35/28+84/90 49/28+84/90