Add 75/80 and 30/28
1st number: 75/80, 2nd number: 1 2/28
75/80 + 30/28 is 225/112.
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,
75/80 = 75 × 7/80 × 7 = 525/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
30/28 = 30 × 20/28 × 20 = 600/560 - Add the two like fractions:
525/560 + 600/560 = 525 + 600/560 = 1125/560 - 1125/560 simplified gives 225/112
- So, 75/80 + 30/28 = 225/112
In mixed form: 21/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/80+60/28 75/80+30/56 75/80+90/28 75/80+30/84