Question

(2/15+y)-7/30=1/10
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Answer 1

$( \frac{2}{15} + y) - \frac{7}{30} = 0.1 \\ \frac{2}{15} + y - \frac{7}{30} = 0.1 \\ - \frac{1}{10} + y = 0.1 \\ y = 0.1 + \frac{1}{10} \\ y = \frac{1}{10} + \frac{1}{10} \\ y = \frac{1}{5} = 0.2$