Add 25/80 and 30/28
1st number: 25/80, 2nd number: 1 2/28
25/80 + 30/28 is 155/112.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
25/80 = 25 × 7/80 × 7 = 175/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
30/28 = 30 × 20/28 × 20 = 600/560 - Add the two like fractions:
175/560 + 600/560 = 175 + 600/560 = 775/560 - 775/560 simplified gives 155/112
- So, 25/80 + 30/28 = 155/112
In mixed form: 143/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/80+30/28 25/80+60/28 25/80+30/56 75/80+30/28 25/80+90/28 25/80+30/84