Add 40/7 and 8/80, Solve 5 5/7 + 8/80 as a fraction

Add 40/7 and 8/80

1^st number: 5 5/7, 2^nd number: 8/80

40/7 + 8/80 is 407/70.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560

Next, find the equivalent fraction of both fractional numbers with denominator 560
For the 1st fraction, since 7 × 80 = 560,
40/7 = 40 × 80/7 × 80 = 3200/560
Likewise, for the 2nd fraction, since 80 × 7 = 560,
8/80 = 8 × 7/80 × 7 = 56/560
Add the two like fractions:
3200/560 + 56/560 = 3200 + 56/560 = 3256/560
3256/560 simplified gives 407/70
So, 40/7 + 8/80 = 407/70
In mixed form: 557/70

MathStep (Works offline)

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