book Maths Puzzle Numerical Ability

Proportions and Percent Equations

20% is 80% of what number please list steps such as 20x X 80?
.80 .80

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book Other Question

is - 5/44 a solution to 4x=5/11? Subtract the complex numbers and simplify: 3+2i/1+2i-1/1-2i= Help! Thank you.