99
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45% of 220= 45% * 220= 0.45 * 220= 99
0.55 percent of 220 = 1210.55% of 220= 55% * 220= 0.55 * 220= 121
80/100 x 220 = 176
you need to quote the circumference to calculate the length of the arc or its percentage
When you calculate 45 of 60, the result is 3/4. As a decimal the result is 0.45, and as a percentage it's 75 percent.