First you need to know what 30% of 186 is. This can be found by multiplying:
0.3 x 186 = 55.8
Then you subtract that number from 186 to find the answer:
186 - 55.8 = 130.2
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25% decrease.
30% decrease
No. From 30 to 45 is an increase of 50% . From 45 to 30 is a decrease of 331/3%.
It is: (75-30)/75 times 100 = 60% decrease
120.4