Add 21/70 and 90/96
21/70 + 90/96 is 99/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 96 is 3360
Next, find the equivalent fraction of both fractional numbers with denominator 3360 - For the 1st fraction, since 70 × 48 = 3360,
21/70 = 21 × 48/70 × 48 = 1008/3360 - Likewise, for the 2nd fraction, since 96 × 35 = 3360,
90/96 = 90 × 35/96 × 35 = 3150/3360 - Add the two like fractions:
1008/3360 + 3150/3360 = 1008 + 3150/3360 = 4158/3360 - 4158/3360 simplified gives 99/80
- So, 21/70 + 90/96 = 99/80
In mixed form: 119/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+90/96 63/70+90/96