Add 45/40 and 30/3, Solve 1 5/40 + 10 0/3 as a fraction

Add 45/40 and 30/3

1^st number: 1 5/40, 2^nd number: 10 0/3

45/40 + 30/3 is 89/8.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 3 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 40 × 3 = 120,
45/40 = 45 × 3/40 × 3 = 135/120
Likewise, for the 2nd fraction, since 3 × 40 = 120,
30/3 = 30 × 40/3 × 40 = 1200/120
Add the two like fractions:
135/120 + 1200/120 = 135 + 1200/120 = 1335/120
1335/120 simplified gives 89/8
So, 45/40 + 30/3 = 89/8
In mixed form: 111/8

MathStep (Works offline)

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