Percentage - Mathematics Questions and Answers


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Mathematics » Percentage

A student multiplied a number by 6/7 instead of 7/6. What is the percentage error in the calculation?

A

36.11

B

26.53

C

13.27

D

18.06

Mathematics » Percentage

Some students (only boys and girls) from different schools appeared for an Olympiad exam. 20% of the boys and 15% of the girls failed the exam. The number of boys who passed the exam was 70 more than that of the girls who passed the exam'. A total of 90 students failed. Find the number of students that appeared for the exam.

A

500

B

400

C

350

D

420

Mathematics » Percentage

A

40%

B

50%

C

45%

D

55%