NCERT Class 8 Mathematics Solutions: Chapter 8 – Comparing Quantities Exercise 8.1 Part 1

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Convert the ratio to percentage

Convert the Ratio to Percentage

Convert the ratio to percentage

Question: 1 Find the ratio of the following:

(a) Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour.

(b) 50m to 10km

(c) 50 Paise to Rs.5

Answer:

(a) Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour.

Speed of cycle

Speed of scooter

Hence ratio of speed of cycle to speed of scooter

(b) 50m to 10km

Ratio =

(c) 50 Paise to Rs.5

Hence, Ratio

Convert the ratio to percentage

Question 2: Convert the following ratio to percentage:

(a) 3:4

(b) 2:3

Answer:

(a)

Percentage of

(b)

Percentage of

Question: 3 72% of 25 students are good in mathematics. How many are not good in mathematics?

Answer: Total number of student = 25

Number of good student in mathematics

Number of good student in mathematics

Hence, percentage of students not good in mathematics