25+12

To write 25 as a fraction with a common denominator, multiply by 22.

25⋅22+12

To write 12 as a fraction with a common denominator, multiply by 55.

25⋅22+12⋅55

Multiply 25 and 22.

2⋅25⋅2+12⋅55

Multiply 5 by 2.

2⋅210+12⋅55

Multiply 12 and 55.

2⋅210+52⋅5

Multiply 2 by 5.

2⋅210+510

2⋅210+510

Combine the numerators over the common denominator.

2⋅2+510

Multiply 2 by 2.

4+510

Add 4 and 5.

910

910

The result can be shown in multiple forms.

Exact Form:

910

Decimal Form:

0.9

Simplify 2/5+1/2