Add 45/30 and 5/8, Solve 1 15/30 + 5/8 as a fraction

Add 45/30 and 5/8

1^st number: 1 15/30, 2^nd number: 5/8

45/30 + 5/8 is 17/8.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 30 × 4 = 120,
45/30 = 45 × 4/30 × 4 = 180/120
Likewise, for the 2nd fraction, since 8 × 15 = 120,
5/8 = 5 × 15/8 × 15 = 75/120
Add the two like fractions:
180/120 + 75/120 = 180 + 75/120 = 255/120
255/120 simplified gives 17/8
So, 45/30 + 5/8 = 17/8
In mixed form: 21/8

MathStep (Works offline)

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