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

Guld.
As 100 : 103½ :: 2210
8 8 825

800 825 11050
4420
17680
Guld. st. pen.
8|00 18232|50 (2279 1 4 cur.
16... 20

22 10|00
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 :

Guld. st. 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.