Reading Voltage Scale in Analog VOM (Voltage Measurement Tagalog) 

There are 50 lines in voltage scale from zero and it has three basic scale (10, 50, 250). To know the volts per lines, you need to divide the scale/range to 50.
10 ÷ 50 = 0.2 (in 10 scale each line is 0.2V)
50 ÷ 50 = 1 (in 50 scale each line is 1V)
250 ÷ 50 = 5 (in 250 scale each line is 5V)
1000 ÷ 50 = 20 (in 1000 scale each line is 20V)
2.5 ÷ 50 = 5 (in 2.5 scale each line is 0.05V)