Add 30/28 and 9/45, Solve 1 2/28 + 9/45 as a fraction

Add 30/28 and 9/45

1^st number: 1 2/28, 2^nd number: 9/45

30/28 + 9/45 is 89/70.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 28 × 45 = 1260,
30/28 = 30 × 45/28 × 45 = 1350/1260
Likewise, for the 2nd fraction, since 45 × 28 = 1260,
9/45 = 9 × 28/45 × 28 = 252/1260
Add the two like fractions:
1350/1260 + 252/1260 = 1350 + 252/1260 = 1602/1260
1602/1260 simplified gives 89/70
So, 30/28 + 9/45 = 89/70
In mixed form: 119/70

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad