The strength of a school increased by 20% in one year , and decreased by 20% in the next year .is the final strength greater or loss than the original one and by how much per cent
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Answer:
decreased by 4%
Step-by-step explanation:
a (+/-) b (+/-) a * b/100
= 20% increase - 20% decrease - 20* 20 / 100
= 0 - 20/ 5
= -4%
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