Add 7/28 and 30/40
7/28 + 30/40 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
7/28 = 7 × 10/28 × 10 = 70/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
30/40 = 30 × 7/40 × 7 = 210/280 - Add the two like fractions:
70/280 + 210/280 = 70 + 210/280 = 280/280 - 280/280 simplified gives 1/1
- So, 7/28 + 30/40 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+30/40 7/28+60/40 7/56+30/40 7/28+30/80 21/28+30/40 7/28+90/40 7/84+30/40 35/28+30/40 49/28+30/40