Add 90/6 and 70/63, Solve 15 0/6 + 1 7/63 as a fraction

Add 90/6 and 70/63

1^st number: 15 0/6, 2^nd number: 1 7/63

90/6 + 70/63 is 145/9.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 6 × 21 = 126,
90/6 = 90 × 21/6 × 21 = 1890/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
70/63 = 70 × 2/63 × 2 = 140/126
Add the two like fractions:
1890/126 + 140/126 = 1890 + 140/126 = 2030/126
2030/126 simplified gives 145/9
So, 90/6 + 70/63 = 145/9
In mixed form: 161/9

MathStep (Works offline)

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