The laboratory spent 2 / 3 * 150 = 300 / 3 = $<<2/3*150=100>>100 on test tubes.

They spent a further 100 / 2 = $<<100/2=50>>50 on safety gear.

In all, they spent 150 + 100 + 50 = $<<150+100+50=300>>300.

Thus, 325 - 300 = $<<325-300=25>>25 of the laboratory’s budget remained.

# Answer

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A laboratory needs flasks, test tubes, and safety gear to carry out its experiments. They were given a $325 budget for the month. They bought $150 worth of flasks, spent two-thirds of that amount on test tubes, and used half of the test tube cost on safety gear. How many dollars of their budget remained?
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25
A laboratory needs flasks, test tubes, and safety gear to carry out its experiments. They were given a $325 budget for the month. They bought $150 worth of flasks, spent two-thirds of that amount on test tubes, and used half of the test tube cost on safety gear. How many dollars of their budget remained?
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