Add 90/10 and 7/84
1st number: 9 0/10, 2nd number: 7/84
90/10 + 7/84 is 109/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
90/10 = 90 × 42/10 × 42 = 3780/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Add the two like fractions:
3780/420 + 35/420 = 3780 + 35/420 = 3815/420 - 3815/420 simplified gives 109/12
- So, 90/10 + 7/84 = 109/12
In mixed form: 91/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/10+14/84 90/20+7/84 90/10+21/84 90/30+7/84 90/10+35/84 90/50+7/84 90/10+49/84 90/70+7/84