EXAMP. What will 2210 guilders in bank money amount to in Holland currency, the agio being 3½ per cent.?

Guild.
As 100 : 103½ :: 2210
8 8 85
800 825 11050
4420
17680
Guild. fl. pen.
8|00|8232|50(2279 1 4 cur.
16...20
22 10|50(
16 8
63 2
56 16
72 32
72 32
Or, by practice.
50)2210
44.2 = 2 per cent.
22.1 = 1 per cent.
2.7625 = ¼ per cent.

2279.0625

If the agio only be required, make the agio the middle term, thus:

Guild. fl. pen.

As 100 : 3½ :: 2210 : 69 1 4 agio. Or work by practice as above.

PROB. II. To reduce current money to bank money.

RULE. As 100 + agio to 100, so the given guilders to the answer.