If someone has pledged to give 10% of X, and you estimate X to be about Y, I think it’s not totally unreasonable to suggest Y*0.1 has been pledged, especially if that person doesn’t disagree with your estimate of X.
If someone has pledged to give 10% of X, and you estimate X to be about Y, I think it’s not totally unreasonable to suggest Y*0.1 has been pledged, especially if that person doesn’t disagree with your estimate of X.