180
Let x = the number
30% of x = 54
0.30 x = 54
0.30x/0.30 = 54/0.30
x = 180
check:
30% of 180 = 54
0.30 * 180 = 54
54=54
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54 as a percentage of 30 = 100*54/30 = 180%
30 is one sixth of 180. As a percentage, this is 16.6 recurring percent. This can be represented on paper as 16.6%, with the 6 after the decimal point having a dot on the top.
16.20
150% of 36 is 54.
40% + 30% = 70%