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Dafna1 [17]
3 years ago
7

Lake Chad in Africa had a surface area of about 10,000 square miles in 1963. Because of climate changes and increased water usag

e by humans, the surface area decreases to about 850 square miles in 2001. By what percent did the surface area change from 1963 to 2001?
Mathematics
1 answer:
9966 [12]3 years ago
8 0

Answer:

Answer is 91.5%

Step-by-step explanation:

In 1963= 10,000 sq miles; In 2001= 850 sq miles

  • Now applying formula of percentage of decrease we get:

% = Decrease in Amount/ Actual Amount

  • Applying values in formula:

= 10000-850/10000

= 9150/10000

% = 0.915

In percentage we get 91.5%

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