Add 25/45 and 36/21, Solve 25/45 + 1 15/21 as a fraction

Add 25/45 and 36/21

1^st number: 25/45, 2^nd number: 1 15/21

25/45 + 36/21 is 143/63.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315
Likewise, for the 2nd fraction, since 21 × 15 = 315,
36/21 = 36 × 15/21 × 15 = 540/315
Add the two like fractions:
175/315 + 540/315 = 175 + 540/315 = 715/315
715/315 simplified gives 143/63
So, 25/45 + 36/21 = 143/63
In mixed form: 217/63

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