You cannot convert 45 into 1!
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To convert a percent to a decimal, divide by 100. This give you 0.45. Use a calculator to multiply 55*.45, and you get 24.75.
To find 70 percent of 45, you would first convert 70 percent to a decimal by dividing by 100, resulting in 0.70. Then, you would multiply this decimal by 45 to find the answer. Therefore, 70 percent of 45 is 31.5.
4.5% as a decimal is 0.045. To convert any percent into a decimal, you just have to move the decimal point two places to the right. When you do that with 4.5, you're left with 0.045.
12.125
2.5