Question

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

Answer 1

Answer:

$\%decreased = \frac{decreased}{original} \times 100 \\ = \frac{40 - 30}{30} \times 10 \\ = \frac{10}{30} \times 100 \\ = 33.33\%$

hope it helps please mark me as brainliest