21
google search
Google search results:
1: https://www.toppr.com/ask/question/if-the-numerator-of-a-fraction-is-increased-by-20-and-the-denominator-is-decreased/
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2: https://www.hufsd.edu/assets/pdfs/academics/algebra_text/Chapter06.pdf
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3: https://www.khanacademy.org/math/cc-fourth-grade-math/comparing-fractions-and-equivalent-fractions/imp-equivalent-fractions-2/v/more-equivalent-fractions
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4: https://quizlet.com/88169547/math-flash-cards/
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5: https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-ratios-prop-topic/visualize-ratios/v/solving-ratio-problems-with-tables-exercise
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6: https://www.mitty.com/assets/files/academics/10-03-MathKey.pdf
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7: https://web.lemoyne.edu/courseinformation/mth%20112/rinaman/instman/SOLUTION.PDF
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8: https://www.utas.edu.au/mathematics-pathways/pathways-to-health-science/module-2-fractions-decimals-ratios-and-percentages
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9: https://files.dep.state.pa.us/water/bsdw/operatorcertification/TrainingModules/both28_basic_math_ak.pdf
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10: http://www.btsd.us/UserFiles/Servers/Server_892300/File/Wood%20Technology/Mathematics%20for%20Carpentry%20and%20the%20Construction%20Trades%203rd%20ed%20-%20A.%20Webster,%20K.%20bright%20(Pearson,%202012)%20BBS.pdf
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11: https://www.engageny.org/sites/default/files/downloadable-resources/2016/Apr/math-g5-m4-full-module_0.pdf
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