a) 1,05 = 105%
2,13 = 213%
0,09 = 9%
1,5 = 150%
0,13 = 13%
0,009 = 0,9%
b) $0,4 = 0,4 \times 100\% = 40\% $
$0,752 = 0,752 \times 100\% = 75,2\% $
$1,36 = 1,36 \times 100\% = 136\% $
$0,018 = 0,018 \times 100\% = 1,8\% $
$3,9 = 3,9 \times 100\% = 390\% $
c) $80\% = \frac{{80}}{{100}} = 0,8$
$8\% = \frac{8}{{100}} = 0,08$
$56\% = \frac{{56}}{{100}} = 0,56$
$210\% = \frac{{210}}{{100}} = 2,1$
$0,7\% = \frac{{0,7}}{{100}} = \frac{7}{{1\,000}} = 0,007$
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