Can I get into Waterloo with just 70%-75%?

Your grade 11 marks really only matter for early admission, so focus more on your grade 12 work. Waterloo does consider volunteer work and extracurriculars when looking at admission. Those factors can only add to your application, not take away from it.

I would say that with a 70-75% average you could get into economics, although it would not be my first choice for that program. (I've taken some of the econ courses at Waterloo). As for computer engineering, I feel like you would need to raise your average in order to gain admission.

Minimum 70's required for all of you HS PRE-Requisites, However, Individual Selection is in the 80's. I'm not sure that Waterloo has an Undergrad in Economics. It's really not know as that type of school - check on their website, though.

Here is the Computer Engineering Requirements from U of Waterloo's website:

Required High School courses

Advanced Functions:

Calculus and Vectors

Chemistry

English (ENG4U)

Physics

A final grade of at least 70% is normally required in each of these courses

Note: Waterloo's admission requirements are expressed in terms of the Ontario high school system, and courses are Grade 12 U courses unless otherwise specified. See Waterloo's minimum admission requirements, Canadian course equivalents, and International equivalents for more details.

Other required documentation & Notes

Admission Information Form

Admission average(s)

Individual selection from the mid-80s

Notes: Admission averages are based on previous years' entering classes. Your admission average is calculated using your top 6 Grade 12 U or M courses, or equivalent, including all required courses.