An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals has a composition that is

The given blank can be filled with andesitic.

Explanation:

An extrusive igneous, volcanic rock, of the composition that comes in between the texture of aphanitic and porphyritic, is known as andesite. Generally, it is the transitional type between rhyolite and basalt. The arrangement of the mineral is generally dominated by plagioclase in addition with other dark silicate minerals.

answer: 45

explanationyou have to add as well to be it could be

50% lit on the left side