They shouldn't speed up, because they could misread paper work or risk giving the wrong medication.
Physical activity is like walking a dog and just doing day to day things with not alot of effort.
Well listening helps me from my pain.
The common denominator for both fractions is 100. You have to multiply the numerator and denominator of the first fraction (21/25) by 4, and the numerator and denominator of the second fraction (17/20) by 5 to obtain this denominator.
After doing that, you should have the fractions 84/100 and 85/100. The latter is the larger one, so your expression would be:
21/25 < 17/20
Hope this helps! If you need some more help understanding this, please reach out to me.