MATH SOLVE

4 months ago

Q:
# Between 2000 and 2010, the percentage of households with cordless phones increased by 13.7% to 82%. What percentage of households had cordless phones in 2000?About _____% of households had cordless phones in 2000.NOTE: Simply subtracting 13.7-82 is INCORRECT and has been marked incorrect. Question Help: To find what percentage of households had cordless phones in 2000, translate the "increased by" statement to an "of" statement. Let A be the percentage of households in 2000 and B be the percentage of households in 2010. What is the proper "of" statement?

Accepted Solution

A:

Answer:72%72.12% to 2 d.p.Step-by-step explanation:Between 2000 and 2010, the percentage of households with cordless phones increased by 13.7% to 82%. In 2010, A people had cordless phones.In 2000, B people had cordless phones.B = A * 113.7% = 82B = A * 1.137 = 82Rearrange the formula to find A:A = B / 1.137 = 72.12 to 2 d.pIn 2010, 72.12% people had cordless phones.In 2000, 82% people had cordless phones.Depending on the accuracy the question asks for, change the answer accordingly. 72.12 * 1.137 = 82.00044