Question

What number should be added to 0.385 to get 2.5?

Answer 1

Step-by-step explanation:

Let the number to be added be a

So, the fraction becomes,

2+a:5+a=5:6

∴

5+a

2+a

=

6

5

On cross multiplying, we have

12+6a=25+5a

6a−5a=25−12

∴a=13

∴ the number added is 13.