17 sums right out of 20.what % is this
To calculate the percentage, you would
- divide part by total
- multiply fraction by 100%
- simplify
For example, if you have 14 sums correct out of 20, then
14 is the "part", 20 is the "total", so
- divide 14/20 = 7/10
- multiply by 100% : 7/10*100%
- simplify to get 70%
Try this with your problem.