Add 9/42 and 90/80
1st number: 9/42, 2nd number: 1 10/80
9/42 + 90/80 is 75/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 42 × 40 = 1680,
9/42 = 9 × 40/42 × 40 = 360/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
90/80 = 90 × 21/80 × 21 = 1890/1680 - Add the two like fractions:
360/1680 + 1890/1680 = 360 + 1890/1680 = 2250/1680 - 2250/1680 simplified gives 75/56
- So, 9/42 + 90/80 = 75/56
In mixed form: 119/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/42+90/80 9/84+90/80 27/42+90/80 45/42+90/80 63/42+90/80