3/7 (4/5) =

Let's evaluate each statement to determine which one is true:

= ​:

To check if these fractions are equal, cross-multiply:

5 × 10 = 50

6 × 9 = 54

Since 50≠54, ≠ ​. This statement is false.

= ​:

To check if these fractions are equal, cross-multiply:

321 × 112 = 35,952

336 × 107 = 35,952

Since 35,952 = 35,952, = ​. This statement is true.

= ​:

To check if these fractions are equal, cross-multiply:

8 × 8 = 64

12 × 3 = 36

Since 54 ≠ 36, 812≠ 38​. This statement is false.

= 4 ​:

Convert 4 ​ to an improper fraction:

4 ​ = =

=

To check if these fractions are equal, cross-multiply:

19 × 2 = 38

4 × 9 = 36

Since 38 ≠ 36, = 4 . This statement is false.

Therefore, the correct statement is: =

Let's evaluate each statement:

120% = 1.02:

To convert 120% to a decimal: 120%=1.20120\% = 1.20120%=1.20.

This statement is incorrect because 120% equals 1.20, not 1.02.

45% = 0.045:

To convert 45% to a decimal: 45%=0.4545\% = 0.4545%=0.45.

This statement is incorrect because 45% equals 0.45, not 0.045.

0.005 = 0.5%:

To convert 0.005 to a percentage: 0.005×100=0.5%0.005 \times 100 = 0.5\%0.005×100=0.5%.

This statement is correct.

DCLXVI = 650:

In Roman numerals: D = 500, C = 100, L = 50, X = 10, V = 5, I = 1.

Adding these: 500+100+50+10+5+1=666500 + 100 + 50 + 10 + 5 + 1 = 666500+100+50+10+5+1=666.

This statement is incorrect because DCLXVI equals 666, not 650.

The correct statement is: 0.005 = 0.5%