Answer:
a) Price increased by 75%
b) Price decreased by 42.85% (or 43% approximate)
Step-by-step explanation:
$ 40 increased by ____ % to $70
[tex]Percentage\ increase = \frac{difference}{ original} \times 100[/tex]
[tex]= \frac{70 - 40 }{40} \times 100\\\\=\frac{30}{40} \times 100\\\\= 75 \%[/tex]
$70 decreased by ______ % to $40
[tex]Percentage \ decrease = \frac{difference }{ original } \times 100[/tex]
[tex]= \frac{70 - 40 }{70} \times 100 \\\\= \frac{30}{70} \times 100\\\\=42.85 \%[/tex]
