model 2 gain lost percentage Section-Wise Topic Notes With Detailed Explanation And Example Questions

Answer: (b)

Gain % = ${18 - 15}/15 × 100$

= $3/15 × 100 = 20%$

Using Rule 8,

Here, x = 18, y = 15

Gain% = $({x - y}/y) × 100$

= $({18 - 15}/15) × 100$

= $3/15 × 100$ = 20%

Answer: (d)

Using Rule 8,

Loss per cent = ${400 - 320}/400 × 100$

= $80/400 × 100 = 20%$

Answer: (c)

Let the CP of each pen be Rs.1.

CP of 8 pens = Rs.8

SP of 8 pens = Rs.12

Gain % = $4/8 ×100$ = 50%

Using Rule 8,

Here, x = 12, y = 8

Profit % = $({x - y}/y) × 100$

= $({12 - 8}/8) × 100$

= $4/8 × 100$ = 50%

Answer: (c)

Let the C.P. of one orange = 1

C.P. of 40 oranges = Rs.40

and S.P. of 40 oranges = Rs.50

Profit = (50 - 40) = Rs.10

Profit % = $10/40 × 100$ = 25%

Using Rule 8,

Here, x = 50, y = 40

Profit % = $({x - y}/y) × 100$

= $({50 - 40}/40) × 100$ = 25%

Answer: (d)

Gain per cent = ${20 - 16}/16 × 100 = 25%$

Using Rule 8,

Here, x = 20, y = 16

Gain % = $({x - y}/y) × 100$

= ${20 - 16}/16 × 100 = 4/16 × 100 = 25%$

Answer: (b)

C.P. of article for A = Rs. 100

A’s S.P. = ${100 × 120}/100$ = Rs. 120

B’s S.P. = ${120 × 85}/100$ = Rs. 102

= C.P. for C

Required profit percent = 2%