Help with ratio 1.0 x 10-2 = 1:100

[kaye77]

please could you help me understand this is very simple terms.

1.0 x 10-2 = 1:100

(as in ten to the power of minus 2)

i do not understand what i need to do to get it into a ratio.

 

[tiny-tim]

Hi kaye77!

(try using the X² tag just above the Reply box )

i do not understand what i need to do to get it into a ratio.

A ratio is exactly the same as a fraction.

So 1.0 x 10^-2 = 0.01 = 1/100 = 2/200 = 39.7174/3971.74,

= 1:100 = 2:200 = 39.7174:3971.74.

(Any ratio would do, but we usually, though not always choose to start with "1:")

btw, the only real advantage of the ratio terminology is that you can use it with more than two numbers, which you can't do with fractions …

for example you can write x:y:z = 1:2:3 in one equation (while using fractions would take at least two equations). ​