Question

The marks in a test decreased from 40 to 30.The percentage decrease is ​

Answer 1

Answer: what was the full marks of the test

Step-by-step explanation:

Answer 2

Step-by-step explanation:

Given:-

original marks=40

decreased marks=30

to find:-%decrease

We know that:-

decreased marks=Original marks-Decreased marks

=40-30

=10

w.k.t:-

decreased%=decreased (100) %

original

=10 (100) %

40

=1000%

40

=25% ans