Write and evaluate the expression. Then, check all that apply. the difference of a number and ninety; when a = 102 A 1-column table with 5 rows. Column 1 is labeled Subtraction Words with entries decreased by, difference, fewer, less than, subtract. Write the expression as StartFraction a Over 90 EndFraction. Write the expression as 90 – a. Write the expression as a – 90. Substitute 102 in for the variable, a. Simplify by subtracting 90 from 102. Simplify by dividing 102 by 90. The answer is 1.13. The answer is 12.