Question

an article was purchased for 1239 rupees including GST of 18 % find the price of article before GST was added​

Answer 1

Cost with gst included = rupees 1239
Cost with out gst = x rupees
gst = 18%
If we take this into equation -
x + ( ( 18 ÷ 100 ) × x ) = 1239
cost before gst + gst = cost with gst
x + ( 9x ÷ 50 ) = 1239
( 50x + 9x ) ÷ 50 = 1239
59x ÷ 50 = 1239
59x = 1239 × 50
59x = 61950
x = 61950 ÷ 59
x = 1050
Price before GST = 1050 rupee

Answer 2

value of 18% of 1239 be x

18% = (x/1239)×100

x = 18×1239/100

x = 22302/100

x = 223.02

Price before GST= 1239-223.02

=Re 1015.98