2/5/12-2 1/4

I’m not sure how you’re intending to parse 2/5/12 - 2 1/4. There are two common interpretations:

1. Left-to-right division: (2/5)/12 - 2 1/4

• (2/5)/12 = (2/5) × (1/12) = 2/60 = 1/30
• 2 1/4 = 9/4
• Result = 1/30 - 9/4 = (2/60) - (135/60) = -133/60 = -2 13/60 ≈ -2.2167

2. Division by a fraction: 2 ÷ (5/12) - 2 1/4

• 2 ÷ (5/12) = 2 × (12/5) = 24/5
• 2 1/4 = 9/4
• Result = 24/5 - 9/4 = (96/20) - (45/20) = 51/20 = 2.55

Which interpretation did you intend? If you meant something else, please clarify and I’ll compute accordingly. For exam prep, it’s helpful to write as improper fractions to avoid ambiguity.