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Of the Exchanges of Rome with Genoa:
ROme exchangeth with Genoa, and giveth posito Crownes 101 * 1.1 of gold of estampe to have in the said place Crownes 100 of gold of Italie, I demand for Crownes 4000 10. of gold of estampe, what credit shall Rome have at Genoa,
you must first reduce the said Crownes of estampe into Crownes of gold of Italie, at the rate of Crownes 100 of estampe, for Crownes 102½ of gold, and therefore you must multiply by 102½ in cutting the two last figures, the which you must multiply by 20, and by 12, and they will make Crownes 4100. 10. 3 of gold of Italy, then say by the Rule of three; if 101 Cro. give 100 cro. what shall 4100 cro. 10. 3 give, and it will come to crow. 4059. 18. 3 of gold in gold of Italy, and for to reduce them into livers, you must multiply them by livers 4 〈◊〉〈◊〉 (the valew of a Crowne of gold) and in so doing, it will come to lib. 18269. 12. 1 current mony, that Rome shall have credit in Genoa for the said Crownes of estampe, as for Example. 〈 math 〉〈 math 〉
The proofe of the said Rule is more apparently demonstrated, when Genoa doth Exchange this parcell backe with Rome. * 1.2
Exchanges of Ro•…•…e with Ge∣noa.
Proofe.