Question

the strength of a school incresed by 20%in one year and decreased by 20% in next year. is the final strength greater or less than the original one and by how percent​

Answer 1

${\mathfrak{\red{\underline{\underline{Solution:-}}}}}$

$\sf{Let\;the\;strength\;be\;100.}$

$\sf{Strength\;in\;1\;year=100+20=120}$

$\sf{Strength\;in\;2\;year\;20\%\;of\;120=24}$

$\sf{Final\;strength=120-24=96}$

$\sf{Decrease=100-96=4}$

$\sf{It\;would\;be\;less\;than\;original\;one\;by\;4\%.}$