Problema Solution
An electric supply company raises its charges by 20% and a year later increases the new charges by 20%.if the total increase had been made all at once,to what percentage would it have been equivalent.
Answer provided by our tutors
use an example. say the charges were $100
first year increases by 20%
so 100(1.2) = 120
second year increases again by 20%
120(1.2) = 144
the charges increase by $44 total.
$44 is 44% of 100.
it will be 44% for any amount of charges
so if the increases had been made all at once, it would be equivalent to 44%.
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