Add 70/20 and 54/84, Solve 3 10/20 + 54/84 as a fraction

Add 70/20 and 54/84

1^st number: 3 10/20, 2^nd number: 54/84

70/20 + 54/84 is 29/7.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
54/84 = 54 × 5/84 × 5 = 270/420
Add the two like fractions:
1470/420 + 270/420 = 1470 + 270/420 = 1740/420
1740/420 simplified gives 29/7
So, 70/20 + 54/84 = 29/7
In mixed form: 41/7

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