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In PHP, all variables must the preceded by the dollar sign. Variable name must not contain any space as well.
To convert a decimal to a percentage, you multiply by 100. So, 0.521 multiplied by 100 is 52.1%. Therefore, 0.521 as a percentage is 52.1%.
That depends on the value of "K"!
If the power of ten is k, where k is an integer thenif k < 0 then the decimal point moves k places to the left;if k = 0 then the decimal point does not move; andif k > 0 then the decimal point moves k places to the right.
The multiples of 4 are numbers of the form 4*k where k is an integer.4*k = 2*(2*k) that is, 4*k is a multiple of 2 - in other word, it is even.