Paul Graham, FRM$$ is analyzing the sales growth of a baby product launched three years

ago by a regional company. He assesses that three factors contribute heavily towards the

growth and comes up with the following results:

Y $=$ b $+1\mathrm{.}5$X$1+1\mathrm{.}2$X$2+3$X$3$

Sum of Squared Regression $[$SSR$]=869\mathrm{.}76$

Sum of Squared Errors $[$SSE$]=22\mathrm{.}12$

Determine what proportion of sales growth is explained by the regression results