Question

cp of 21 watch is equal
to sp of 18 watch then find the profit percent

Answer 1

CP of 21 watch=x
CP of 1 watch=x/21

SP of 18 watch =x
SP of 1 watch=x/18

since x/21 <x/18, there is a gain
gain=SP-CP
=x/18-x/21
=(7x-6x)/126
=x/126

gain%=gain/CP×100
=(x/126÷x/21)×100
=(x/126×21/x)×100
=100/6
=50/3
=16 2/3%


plse mark as brainlest

Answer 2

given
cp of 21=sp of 18
sp =21cp/18=7cp/6
profit = (sp-cp/cp)×100
profit= (7cp-6cp/6cp)×100
profit =100/6%
hope it helps you....