Mathy Manuel's autograph was once worth $\$ 100$. The autograph then dropped $30 \%$ in value. If it then increased by $40 \%$, its value would be
(A) $\$ 98$
(B) $\$ 48$
(C) $\$ 100$
(D) $\$ 78$
(E) $\$ 90$
When Mathy Manuel's autograph dropped $30 \%$ in value, it lost $\$ 100 \times 0.30=\$ 30$ of its value. After this drop, the autograph was worth $\$ 100-\$ 30=\$ 70$.

If the autograph then increased by $40 \%$ in value, the increase would be $\$ 70 \times 0.40=\$ 28$. After this increase, the autograph would be worth $\$ 70+\$ 28=\$ 98$.

ANSWER: (A)