Add 9/80 and 7/42
9/80 + 7/42 is 67/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
9/80 = 9 × 21/80 × 21 = 189/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
7/42 = 7 × 40/42 × 40 = 280/1680 - Add the two like fractions:
189/1680 + 280/1680 = 189 + 280/1680 = 469/1680 - 469/1680 simplified gives 67/240
- So, 9/80 + 7/42 = 67/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80+7/42 9/80+14/42 9/80+7/84 27/80+7/42 9/80+21/42 45/80+7/42 9/80+35/42 63/80+7/42 9/80+49/42