Add 25/30 and 54/21, Solve 25/30 + 2 12/21 as a fraction

Add 25/30 and 54/21

1^st number: 25/30, 2^nd number: 2 12/21

25/30 + 54/21 is 143/42.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
25/30 = 25 × 7/30 × 7 = 175/210
Likewise, for the 2nd fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210
Add the two like fractions:
175/210 + 540/210 = 175 + 540/210 = 715/210
715/210 simplified gives 143/42
So, 25/30 + 54/21 = 143/42
In mixed form: 317/42

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