Add 6/40 and 84/63, Solve 6/40 + 1 21/63 as a fraction

Add 6/40 and 84/63

1^st number: 6/40, 2^nd number: 1 21/63

6/40 + 84/63 is 89/60.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 40 × 63 = 2520,
6/40 = 6 × 63/40 × 63 = 378/2520
Likewise, for the 2nd fraction, since 63 × 40 = 2520,
84/63 = 84 × 40/63 × 40 = 3360/2520
Add the two like fractions:
378/2520 + 3360/2520 = 378 + 3360/2520 = 3738/2520
3738/2520 simplified gives 89/60
So, 6/40 + 84/63 = 89/60
In mixed form: 129/60

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