Promo2 jawab pake caranya ya

Persentase luas lahan temulawak = 100%-6%-22%-17%-22%-22%=11%
Luas lahan temulawak 2,2ha = 11%

Luas lahan : luas lahan temulawak =
100% : 11% = z : 2,2ha
z = 100%/11%×2,2ha = 20ha

Luas lahan jahe = 17%×20ha = 3,4ha