20.4 pounds.
100*(51/40 - 1) = 100*11/40 = 27.5%
85 - (40%) = 51
3.5% of 40 pounds:= 3.5% * 40= 0.035 * 40= 1.4 pounds
20.4
40% of 360 pounds = 360*40/100 = 144 pounds.
2
40% of 15lbs is 6lbs
£12, or 12 pounds
The amount after the discount is $30.60
50% of £80 = £40 = 50% * £80 = 50%/100% * £80 = £40
40 % of 40 is 16 40% off is 40-16=24
£11.20