Question

60%of 30 students are good in mathematics. How many are not good in mathematics?​

Answer 1

Answer:

12 are not good in Mathematics.

Step-by-step explanation:

60/100 × 30 = 18

30-18=12

Answer 2

Answer:

12 students are not good at mathematics

Step-by-step explanation:

Percentage of students good at mathematics = 60%

Percentage of students not good at mathematics = (100-60)% = 40%

Number of students not good at mathematics = 40% of 30

                                                                             = $\frac{40}{100}$ x 30

                                                                             = $\frac{1200}{100}$

                                                                             = 12

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