How can this model be used to determine 2.4−0.15 ?

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The model shows a total of 2 wholes and 4 tenths. After regrouping 1 tenth into 10 hundredths, there are 2 wholes,
tenths, and
hundredths. After crossing out 1 tenth and 5 hundredths, there are 2 wholes,
tenths, and
hundredths remaining. Therefore, the difference of 2.4 and 0.15 is
.
Two large squares, each divided into a 10 by 10 grid of 100 small squares. Four columns, each divided into 10 small squares.
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