Add 54/7 and 10/18, Solve 7 5/7 + 10/18 as a fraction

Add 54/7 and 10/18

1^st number: 7 5/7, 2^nd number: 10/18

54/7 + 10/18 is 521/63.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
54/7 = 54 × 18/7 × 18 = 972/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126
Add the two like fractions:
972/126 + 70/126 = 972 + 70/126 = 1042/126
1042/126 simplified gives 521/63
So, 54/7 + 10/18 = 521/63
In mixed form: 817/63

MathStep (Works offline)

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