Answer:
-2 1/4
converting the fraction to decimals
-2 2/5 = -2.4
-2.1 = -2 1/10
-2 1/4 = -2.25
this is between -2.1 and -2.4 on the number line
Explanation:
to determine which number is between the numbers specified, convert to fractions
-2 2/5 = -2.4
-2.1 = -2 1/10
-2 1/4 = -2.25
3/10 = -0.3
this is less than -2.1
-21/2 = -2.5
this is greater than -21/4
-15/6 = -1.83
this is less than -2.1
it is only, -21/4 that is between the numbers