A househould uses approximately 37.9726 m3 of water in a
particular month. If the national average of water usage per month
for a typical 5-rom HDB flat in Singapore is 19.1m3, how many
percent above average is the water usage for this household?
Here's my working
37.9726 - 19.1 = 18.8726 m3
%tage above average = (18.8726/19.1) X 100
=98.809
%
= 98.8%
49.7% is the answer given. but i still think my method is
correct. I mean, if it's 100% increase above average, the amount of
water used would be about 38.2 m3, which is somewhere near
37.9726m3
By the way, on calculating service charge and GST, SC is
calculated based on ONLY your food/item bill while GST includes the
bill of both SC and item right?