FaniiA
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# What is the answer to number 11

Current Length (CL) = 4 inch Current Width (CW) = 2 inch Current Perimeter (CP) = 2*(CL + CW) = 2*(4 + 2) = 2*6 = 12 inch Current Area (CA) = CL * CW = 4 * 2 = 8 inch After doubling the side lengths, New Length (NL) = 8 inch New Width (NW) = 4 inch New Perimeter (NP) = 2*(NL + NW) = 2*(8 + 4) = 2*12 = 24 inch New Area (NA) = NL * NW = 8 * 4 = 32 inch Hence, Percentage change in perimeter  = $\frac{NP - CP}{CP} * 100 = \frac{24 - 12}{12} * 100 = \frac{12}{12} *100$ = 100 % Percentage change in area = $\frac{NA - CA}{CA} *100 = \frac{32 - 8}{8} *100 = \frac{24}{8} *100$ = 300 %