Add 50/30 and 40/84, Solve 1 20/30 + 40/84 as a fraction

Add 50/30 and 40/84

1^st number: 1 20/30, 2^nd number: 40/84

50/30 + 40/84 is 15/7.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 30 × 14 = 420,
50/30 = 50 × 14/30 × 14 = 700/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
40/84 = 40 × 5/84 × 5 = 200/420
Add the two like fractions:
700/420 + 200/420 = 700 + 200/420 = 900/420
900/420 simplified gives 15/7
So, 50/30 + 40/84 = 15/7
In mixed form: 21/7

MathStep (Works offline)

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