Without evaluating each expression, determine which value is the greatest. Explain how you know.
a.7 ⅚ - 9 ¾
b.(-7 ⅚ ) + (- 9 ¾ )
c.(-7 ⅚ ) ⋅ 9 ¾
d.(-7 ⅚ ) ÷ (- 9 ¾ )