AC Lim's answer to Nicholas's Secondary 2 Maths Singapore question.

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AC Lim
Ac Lim's answer
12449 answers (A Helpful Person)
1st
Based on calculations, not justified.
As press just based on household usage within 0-40m3 only. If household usage more than 40m3. % increased will be more than 30%.
Jul1.2017 Price increased for 0-40m3 is 13.81%
Jul 1. 2018 Price increased for 0-40m3 is 14.64%
Total increased is 28.45%.