new a value is 1.2a
new b value is 1.2b
new X value = (1.2a)(1.2b) = 1.44ab
increase is 44%
e.g.
suppose a = 60 and b = 80
old X = 4800
new a = 1.2(60) = 72
new b = 1.2(80) = 96
new X = (72)(96) = 6912
6912/4800 = 1.44 or 144%
so it increased by 44%
Given that 𝑋 = 𝑎𝑏, find the percentage increase in X when both a and b increase by 12%.
2 answers
Thank you