Question

lets say my grade is 86%.. Now, how many points would i need in order to raise it to an 89 or 90%?

Answer 1

I can calculate that, but I need one of these pieces of information first:

- The total points possible so far and how many points you have earned (e.g., 860 out of 1000), or
- The percentage weight of what’s left (for example “final exam is 20% of the course”), and whether there are specific upcoming assignments with point values.

Short formulas you can use

1) If you know points so far:
- Let T = points possible so far, C = points you have now, R = points remaining (future assignments), and target = desired percent (as a decimal, e.g. 0.90).
- Points needed on remaining work: S = target*(T + R) − C.
- Average percent needed on remaining work = S / R (then convert to percent).

2) If you know weight of remaining work:
- Let f = fraction of grade left (e.g. final = 20% → f = 0.20), and current = 86% (as decimal 0.86).
- Required average on remaining = (target − (1 − f)*current) / f.

Examples

A) Points example: suppose you have 860/1000 now (86%) and there’s one 100‑point assignment left (R = 100).
- To reach 90%: need S = 0.90*(1100) − 860 = 990 − 860 = 130 → impossible (would need 130/100).
- To reach 89%: S = 0.89*1100 − 860 = 979 − 860 = 119 → also impossible.

B) Weighted final example: current = 86%, final is worth 20% (f = 0.20).
- To reach 90%: needed on final = (0.90 − 0.80*0.86)/0.20 = (0.90 − 0.688)/0.20 = 1.06 → 106% (impossible).
- If final is worth 40% (f = 0.40): needed = (0.90 − 0.60*0.86)/0.40 = 0.96 → 96%.

If you tell me either (A) your current points and total possible so far plus points remaining (or their values), or (B) the percent weight of the remaining work, I’ll compute exactly what you need for 89% and 90%.