824 is between which two numbers ?

823 and 825

Step-by-step explanation: i doubt this is what you meant but be more specific

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons