Question

Can somebody help me to solve this question​

Answer 1

Answer:

(a) Let x percent of 42 is 29.4

So, according to the question,

x/100 × 42= 29.4

or, x= 29.4 × 100/42

=70

Ans. 70% of 42 is 29.4

(b) Let a percent of 63 is 31.5

So, according to the question,

a/100 × 63= 31.5

or, a= 31.5 × 100/63

=50

Ans. 50% of 63 is 31.5

Answer 2

x% of 42 is 29.4

y% of 63 is 31.5

Step-by-step explanation:

To find the solution, you need to form the equation,

x% of 42 is 29.4

(x/100) x 42 = 29.4

x/100 = $\frac{29.4}{42}$

x = ($\frac{29.4}{42}$) x 100

x = $\frac{294}{420}$ x 100

x = $\frac{2940}{42}$

x = 70

Hence, 70% of 42 is 29.4.

y% of 63 is 31.5

(y/100) x 63 = 31.5

x/100 = $\frac{31.5}{63}$

x = ($\frac{31.5}{63}$) x 100

x = $\frac{315}{630}$ x 100

x = $\frac{3150}{63}$

x = 50

Hence, 50% of 63 is 31.5.