90% is equal to 0.90. Therefore, asking "what is 90% of 2.00?" is the same thing as asking "what is 2.00 * 0.90?". 2.00 * 0.90 = 1.80 If you were unsure about how to go about solving this problem, there was an even easier way to do it. You know that 90% of one is 0.9, and you know that two is twice the size of one. Therefore, 90% of two would be 180% of 1, or 1.80.
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.90 X 200 = 180
We need to find 90% of 200. 90 % = 90/100. Therefore, 90% of 200 can be written as (90/100)*200 =(9/10)*200 =(9)*(20) =180 Therefore, 90 percent of 200 is 180.
If 50% of 90 is 50/100 * 90, which equals 45, then 200% of 90 = 200/100 * 90 = 2 * 90 = 180.