Question 460453
1) {{{7/8-1/4=7/8-4/8=(7-2)/8=5/8}}}
2) {{{8 }}}{{{1/2 - 4=(8-4)}}}{{{1/2}}}={{{4}}}{{{1/2}}}
3) {{{3}}}{{{7/10 - 1}}}{{{ 1/2=2}}}{{{(7-5)/10=2}}}{{{1/5}}}