Add 90/60 and 20/84
1st number: 1 30/60, 2nd number: 20/84
90/60 + 20/84 is 73/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
90/60 = 90 × 7/60 × 7 = 630/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Add the two like fractions:
630/420 + 100/420 = 630 + 100/420 = 730/420 - 730/420 simplified gives 73/42
- So, 90/60 + 20/84 = 73/42
In mixed form: 131/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+40/84 90/60+60/84