Add 60/40 and 84/21, Solve 1 20/40 + 4 0/21 as a fraction

Add 60/40 and 84/21

1^st number: 1 20/40, 2^nd number: 4 0/21

60/40 + 84/21 is 11/2.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 40 × 21 = 840,
60/40 = 60 × 21/40 × 21 = 1260/840
Likewise, for the 2nd fraction, since 21 × 40 = 840,
84/21 = 84 × 40/21 × 40 = 3360/840
Add the two like fractions:
1260/840 + 3360/840 = 1260 + 3360/840 = 4620/840
4620/840 simplified gives 11/2
So, 60/40 + 84/21 = 11/2
In mixed form: 51/2

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