Question

Three quarters of a number is 15 what is four fifths of the number

Answer 1

Answer:

${ \huge{ \underline{ \bf{ \red{Given}}}}}$

Three quarters of a number is 15

${ \to{ \sf{Take \: the \: number \: as \: x}}}$

${ \to{ \sf{ \frac{3}{4} \times x = 15}}}$

${ \to{ \sf{ \frac{3x}{4} = 15}}}$

${ \to{ \sf{ 3x = 15 \times 4}}}$

${ \to{ \sf{3x = 60}}}$

${ \to{ \sf{x = \frac{60}{2} }}}$

${ \to{ \sf{x = 20}}}$

So, the number is 20

Find :- Four fifths of the number

Solution:-

${ \to{ \sf{ \frac{4}{5} \times x}}}$

${ \sf{we \: got \: the \: number \: as \: 20}}$

${ \sf{so ,\: x = 20}}$

${ \to{ \sf{ \frac{4}{5} \times 20 = \frac{4}{{ \cancel{5}}} \times { \cancel{20}}} = 4 \times 4 = 16}}$

${ \therefore{ \sf{Four \: fifths \: of \: the \: number \: is \: 16}}}$