The easy way to ielts writing academic Module

Something is double, half, triple, or quadruple that of
something else
The tulip garden had a double harvest that of the rose garden.
The company’s profit was triple that of the year before after
implementing new marketing strategies.
The amount of time spent on reading was half that of the amount of
time for playing sports.
Something doubles(d), halves(d), triples(d), or quadruples(d)
The figure for unemployment tripled due to the economic recession.
The annual income for families with no children doubled in 2012.
The rate for crime halved over the given period.

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Other words and phrases to show similarities are 
similarly,
both X and Y, like, same as, in a similar way, in a similar
fashion.
Similarly , Germany and France had a high rate of unemployment at
23%.
Both the UK and France established strict social rules in 2015.
Like the US , Canada contributed to the reconstruction of the
affected areas after the war.
The interest rate in Japan was the same as this figure in China in
2005.
Expressing contrast
When trends take different directions, contrasting words and phrases are
useful in describing them; however, words or phrases that show “
the
concession
,” such as although/even though/ nonetheless/nevertheless/in
spite of/despite, etc. are 
not
widely used in writing task1 as in this writing
type, it is essential to distinguish differences between numbers and amounts
rather than discussing contradictions in points of views. Some practical
contrasting words and phrases are as follows:
In contrast:
In contrast , the figure for volleyball had a gradual decline.
Swimming was the most popular sport for girls; in contrast , soccer
came top for boys.