Question

find the selling price if a profit of 5% is made on a cycle of rupees 900 with Rs 100 as overhead charges

Answer 1

total cp=1000
p%=5%
sp=100+p%/100 *cp
sp=100+5/100 *1000
sp=105/100 *1000
sp=
$\frac{105}{100} \times 1000$
$\frac{21}{20} \times 1000$

cancel 1000 by 20 at 50 times and multiply 50 by 21
answer is....
21x50
1050 rs

Answer 2

the answer is (dint wanna explain):

1050  ₹