Question

Sara has $400$ marbles. if she gives $\frac{1}{5}$th of her marbles to Sam and Sam gives $\frac{3}{4}$ th of his marbles to David, then how many marbles does Sam have left?

Answer 1

Given : Total number of marbles $=400$

Number of marbles given to Sam = $\frac{1}{5}\times 400=80$
Number of marbles given to David by Sam = $\left(\frac{3}{4}\right)\times 80=60$
Number of marbles left with Sam = $(80-60)=20$

Hence, number of marbles left with Sam is $20$