to find interest
on L1,250 per annum, add sums given for L1,000, L200, and L50. 2 per
cent, is found by taking half of 4 p.c; 8 p.c., by doubling 4 p.c.;
7-1/2 p.c., by adding 5 to 2-1/2 p.c., and so on._

Principal. 2-1/2 P.C. 3 P.C. 3-1/2 P.C. 4 P.C. 5 P.C.
L L s. d. L s. d. L s. d. L s. d. L s.
1 0 0 6 0 0 7-1/4 0 0 8-1/2 0 0 9-1/2 0 1
2 0 1 0 0 1 2-1/2 0 1 4-3/4 0 1 7-1/4 0 2
3 0 1 6 0 1 9-1/2 0 2 1-1/4 0 2 4-3/4 0 3
4 0 2 0 0 2 4-3/4 0 2 9-1/2 0 3 2-1/2 0 4
5 0 2 6 0 3 0 0 3 6 0 4 0 0 5
6 0 3 0 0 3 7-1/4 0 4 2-1/2 0 4 9-1/2 0 6
7 0 3 6 0 4 2-1/2 0 4 10-3/4 0 5 7-1/2 0 7
8 0 4 0 0 4 9-1/2 0 5 7-1/4 0 6 4-3/4 0 8
9 0 4 6 0 5 4-3/4 0 6 3-1/2 0 7 2-1/2 0 9
10 0 5 0 0 6 0 0 7 0 0 8 0 0 10
20 0 10 0 0 12 0 0 14 0 0 16 0 1 0
30 0 15 0 0 18 0 1 1 0 1 4 0 1 10
40 1 0 0 1 4 0 1 8 0 1 12 0 2 0
50 1 5 0 1 10 0 1 15 0 2 0 0 2 10
60 1 10 0 1 16 0 2 2 0 2 8 0 3 0
70 1 15 0 2 2 0 2 9 0 2 16 0 3 10
80 2 0 0 2 8 0 2 16 0 3 4 0 4 0
90 2 5 0 2 14 0 3 3 0 3 12 0 4 10
100 2 10 0 3 0 0 3 10 0 4 0 0 5 0
200 5 0 0 6 0 0 7 0 0 8 0 0 10 0
300 7 10 0 9 0 0 10 10 0 12 0 0 15 0
400 10 0 0 12 0 0 14 0 0 16 0 0 20 0
500 12 10 0 15 0 0 17 10 0 20 0 0 25 0
600 15 0 0 18 0 0 21 0 0 24 0 0 30 0
700 17 10 0 21 0 0 24 10 0 28 0 0 35 0
800 20 0 0 24 0 0 28 0 0 32 0 0 40 0
900 22 10 0 27 0 0 31 10 0 36 0 0 45 0
1000 25 0 0 30 0 0 35 0 0 40 0 0 50 0

2775. Ready-Reckoning or Marketing Table.

No. 2d. 2-1/2d. 3d. 3-1/2d. 4d. 4-1/2d. 5d. 5-1/2d. 6d. 6-1/2d.
s. d. s. d. s. d. s. d. s. d. s. d. s. d.