Add 63/56 and 84/70, Solve 1 7/56 + 1 14/70 as a fraction

Add 63/56 and 84/70

1^st number: 1 7/56, 2^nd number: 1 14/70

63/56 + 84/70 is 93/40.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280

Next, find the equivalent fraction of both fractional numbers with denominator 280
For the 1st fraction, since 56 × 5 = 280,
63/56 = 63 × 5/56 × 5 = 315/280
Likewise, for the 2nd fraction, since 70 × 4 = 280,
84/70 = 84 × 4/70 × 4 = 336/280
Add the two like fractions:
315/280 + 336/280 = 315 + 336/280 = 651/280
651/280 simplified gives 93/40
So, 63/56 + 84/70 = 93/40
In mixed form: 213/40

MathStep (Works offline)

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