Add 70/63 and 40/54, Solve 1 7/63 + 40/54 as a fraction

Add 70/63 and 40/54

1^st number: 1 7/63, 2^nd number: 40/54

70/63 + 40/54 is 50/27.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 63 × 6 = 378,
70/63 = 70 × 6/63 × 6 = 420/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
40/54 = 40 × 7/54 × 7 = 280/378
Add the two like fractions:
420/378 + 280/378 = 420 + 280/378 = 700/378
700/378 simplified gives 50/27
So, 70/63 + 40/54 = 50/27
In mixed form: 123/27

MathStep (Works offline)

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